SPENCE, J.
Defendant was found guilty of six counts of violation of section 286 and three counts of violation of section 288 of the Penal Code, in relation to. several young boys. His motion for a new trial was denied, as was his [472]*472application for probation, and he was sentenced on each count to the state prison for the term prescribed by law— the sentences on the six counts of sodomy to run concurrently with each other, and the sentences on the three counts of lewd and lascivious conduct to run concurrently with each other and consecutively with the sentences on the first six counts. He has appealed from the judgment of conviction and from the order denying his motion for a new trial.
As grounds for reversal, appellant urges: (1) the insufficiency of the evidence to sustain the verdicts, especially by reason of the claim that the prosecuting witnesses were accomplices and that corroboration, as required by section 1111 of the Penal Code, was lacking; (2) errors of law occurring at the trial in relation to the admission of certain rebuttal testimony; and (3) errors in the instructions to the jury. Careful consideration of the record in the light of these objections and the applicable principles of law negatives the force of appellant’s respective contentions and establishes his conviction to be the result of a fair trial with proper regard for his substantial rights.
Appellant was accustomed to taking young boys— sometimes singly and sometimes in groups—on camping trips. The several boys here involved testified that the acts in question occurred at various times when they accompanied appellant on such trips. Appellant took the witness stand in his own behalf and denied the accusations. Thus as is usual in these cases, there was a sharp conflict in the testimony, and it becomes unnecessary to recite the sordid details in evidence. No rule is better established in this state than that prescribing the function of an appellate court in reviewing this type of record. “When there is a conflict in the evidence it devolves upon the jury to determine its weight and which witnesses should be believed. When the verdict is based on conflicting evidence it will not be set aside if there is substantial evidence supporting it.” (People v. Ahsbahs, 77 Cal.App.2d 244, 248 [175 P.2d 33].) While there were some contradictions and slight inconsistencies in the boys’ testimony, it cannot be said as a matter of law that their respective stories were inherently improbable in their vital particulars. Nor did the failure of the boys to report the commission of the acts to their parents for some period of time'fender the boys’ stories unworthy of belief. . These all were matters for the jury’s consideration (People v. Fremont, 47 Cal.App.2d 341, 349 [117 P.2d 891]; [473]*473People v. Grant, 53 Cal.App.2d 286, 287 [127 P.2d 567]), and this court may not disturb the verdicts if the jury could reasonably have drawn the conclusion from the evidence that appellant committed the acts in question. To this point it was aptly said in People v. Becker, 140 Cal.App. 162, at page 166 [35 P.2d 196]: “It is the peculiar and exclusive province of the jury to decide upon the credibility of witnesses; and although impeaching evidence in the nature of contradictions or otherwise has been received, it is still not only the right but the duty of the jury to determine to what extent they will believe or disbelieve the testimony of the witness thus assailed.” The application of these principles is strengthened where, as here, the trial court has refused a new trial and thereby approved the findings of the jury. (People v. Tedesco, 1 Cal.2d 211, 219 [34 P.2d 467].)
Nor does the record sustain appellant’s further challenge of the sufficiency of the evidence upon the ground that the boys here involved were accomplices and that there was no corroboration of their testimony. All of the boys were under the age of 14 years at the time of the alleged commission of the acts in question. With respect to the three counts of violation of section 288 of the Penal Code, no corroboration was required of the two boys there concerned and the court properly so instructed the jury. (People v. Troutman, 187 Cal. 313, 317-318 [201 P. 928]; People v. Spillard, 15 Cal.App.2d 649, 655 [59 P.2d 887]; People v. Von Benson, 38 Cal.App.2d 431, 435 [101 P.2d 527].)
With respect to the six counts of violation-of section 286 of the Penal Code, the question of whether or not the two boys there involved were accomplices-—each in relation to three alleged acts—was submitted to the jury. At the trial each of the boys admitted that at the time of the commission of the acts he knew them to be wrongful (Pen. Code, § 26, subd. 1), but each maintained that he “was afraid of” appellant and did not “willingly” participate in the acts. In these circumstances the court covered fully in its instructions the applicable law pertaining to accomplices—the statutory definition and the required corroboration to justify a conviction as provided by section 1111 of the Penal Code, as well as “the distinction between the consent necessary to constitute one an accomplice and mere assent and submission without consent. ’ ’ (People v. Kanngiesser, 44 Cal.App. 345, 347 [186 P. 388].) The importance of this latter consideration rests on the [474]*474premise .that the boys’ mere submission to the violation of their persons would not involve the criminal intent necessary to subject them to prosecution for commission of the acts, and so classify them as accomplices. (People v. Conklin, 122 Cal.App. 83, 91 [10 P.2d 98].)
In People v. Dong Pok Tip, 164 Cal. 143 [127 P. 1031], where the alleged victim was a boy 9 years of age, the rule is thus stated at page 147: “It may be admitted that the evidence shows that the boy was ignorantly indifferent and passive in the hands of the defendant, even to the point of submission; but there is a decided difference in law between mere submission and actual consent. Consent, in law, means a voluntary agreement by a person in the possession and exercise of sufficient mentality to make an intelligent choice, to do something proposed by another. ‘Consent’ differs very materially from ‘assent.’ The former implies some positive action and always involves submission. The latter means mere passivity or submission, which does not include consent. (Citing authorities.) In cases of the character under discussion, the age and mentality of the subject of an indecent assault is important, and should always be considered in determining the presence or absence of consent. The mere submission of a child of tender years or retarded mental development to an attempted outrage of its person should not, in and of itself, be construed to be such consent as would, in point of law, justify or excuse the assault. (2 Bishop’s New Criminal Law, sec. 35, subd. 2.) It is neither unreasonable nor unnatural to assume that such a child, in the hands of a strong man, might be easily overawed into submitting without actually consenting. (Citing authority.) ”
That the boys accompanied appellant on successive camping trips and so gave appellant opportunity to repeat his alleged criminal acts upon them would not be conclusive; it would only be evidence which it would be proper for the jury to consider in connection with other facts tending to solve the question whether they acted voluntarily and with “common intent” united in the commission of the acts. (People v. Featherstone, 67 Cal.App.2d 793, 796 [155 P.2d 685].) The jury may have concluded that appellant’s dominant personality kept the boys interested in going on the camping trips for the hunting, fishing and like activities, despite the possibility that they would thereby run the risk of suffering like mistreatment from appellant. There is no suggestion in the [475]*475record that the boys were consulted beforehand concerning the commission of the acts, or that they, in any manner, affirmatively participated therein. With these considerations at hand, the jury apparently accorded full credit to the boys’ testimony that they did not “willingly” join in the criminal acts, and so concluded that their part therein constituted an “assent” rather than a “consent.” Consequently the boys, by virtue of the evidence accepted by the jury as true, were not accomplices and corroboration of their testimony was not necessary. (People v. Featherstone, supra, 67 Cal.App.2d 793, 796.)
Upon reaching this conclusion with regard to the sufficiency of the evidence, the second major point to be noted is appellant’s contention as to alleged errors of law occurring during the trial by reason of the admission of certain testimony adduced on behalf of the prosecution. Counsel for appellant concedes that “on some occasions the defendant may have flipped some of the boys in fun or that possibly when he was sleeping alongside of them his private parts may have touched them.” On direct examination, appellant was asked by his counsel: “Did you at any time fondle their privates during the time you were wrestling ? . . . Did you ever fondle them, touch them?” He answered, “I may have touched them” but he denied that such act was done “with any intent of arousing [his] passions or their passions.” Then appellant’s counsel, “to settle the question,” elicited from appellant the statement that he had never “at any time” committed any act of sodomy, or any lewdness, in the county of trial or in “any other county” upon any boy. Thereupon appellant was asked upon cross-examination, and over objection by his counsel, if he had not committed such acts upon three specifically named boys, persons other than the prosecuting witnesses. Appellant denied that he had. Upon rebuttal, the prosecution called the three boys. Each testified, over objection by appellant’s counsel, that appellant, had committed upon him acts denounced by section 288 of the Penal Code; each stated that he was then “under fourteen years of age”; and each fixed the date of occurrence as within the same general- period pertinent to the time of the alleged criminal conduct for which appellant was standing trial. The boys adhered to their stories throughout cross-examination, and upon surrebuttal appellant flatly denied their accusations. Appellant claims that the “admission of this [adverse] testimony was serious error,” [476]*476for it concerned other offenses identified as having been committed in counties other than Los Angeles County, the place of trial, and for which he was not being tried.
It is the general rule that evidence of other crimes, where it is offered solely to prove criminal disposition or propensity on the part of the accused to commit the crime charged, should be excluded because its probative value is outweighed by its prejudicial effect. (22 C.J.S., Criminal Law [1940], § 682, p. 1084; 8 Cal.Jur., Criminal Law [1922], §167, p. 58; Wigmore on Evidence (3d ed.), vol. I, §193, p. 642; § 194, p. 646.) Application of this general rule in prosecutions charging the commission of lewd and lascivious acts may be found in the eases of People v. Anthony, 185 Cal. 152,157 [196 P. 47]; People v. Asavis, 22 Cal.App.2d 492, 494 [71 P.2d 307]; and People v. Huston, 45 Cal.App.2d 596, 597 [114 P.2d 607], where, so far as the respective opinions disclose, the prosecution was undertaking to prove similar offenses as part of its case in chief. But here a totally different situation is involved where appellant, apparently actuated by a desire to place himself in an especially favorable light before the jury, injected into the ease in the course of his direct examination the whole subject matter of his past conduct with any boy, and it was to offset the effect of this gratuitous testimony that the prosecution introduced the challenged evidence.
The propriety of the rebuttal testimony stems from the settled rule that it is proper in a criminal case to cross-examine a defendant upon any relevant and material matter elicited on his direct examination, for the purpose of showing conduct or statements inconsistent with his direct testimony. (Pen. Code, § 1323; People v. Gallagher, 100 Cal. 466, 475-478 [35 P. 80]; People v. Buckley, 143 Cal. 375, 388-390 [77 P. 169]; People v. Mammilato, 168 Cal. 207, 213-214 [142 P. 58]; People v. Hoffman, 199 Cal. 155, 161-162 [248 P. 504]; People v. King, 13 Cal.2d 521, 527 [90 P.2d 291]; People v. Wilson, 25 Cal.2d 341, 350-351 [153 P.2d 720]; People v. Page, 28 Cal.App.2d 642, 649 [83 P.2d 77]; People v. Reese, 65 Cal.App.2d 329, 347 [150 P.2d 571]; People v. Zammora, 66 Cal.App.2d 166, 213-214 [152 P.2d 180].) As was said in People v. Gallagher, supfa, at page 476: “The right of cross-examination affords the most effective mode of testing the accuracy or credibility of a witness, and should not be restricted beyond the requirements of the statute. [Pen. Code, § 1323.] It was [477]*477not the intention of the legislature to give to a 'defendant the opportunity of making any statement upon his direct examination which he might choose, in reference to the issue before the court, and to preclude the prosecution from showing out of his own mouth that such statement is false.” The correlating principle sustaining the admission of rebuttal testimony where the defendant opens the door to its reception is forcefully illustrated in the case of People v. Hoffman, supra, a prosecution for murder. The parallel features of the record there appear at pages 161-162, where the court noted the line of inquiry as follows:
“While on the witness stand on his own behalf the appellant was interrogated in part by his counsel to the following effect: ‘During the 22 years you have been in Imperial County, except for the matter which is the subject of this trial here, have you ever had any trouble or difficulty with anybody whomsoever, other than a matter of such discussion as anyone is apt to be subject to? Have you ever been charged with any offense whatsoever?’ Appellant responded: ‘Never, never in my life.’ On cross-examination, and over the objection of appellant’s counsel, the prosecution asked the appellant the following questions: ‘Q. This is the first occasion you ever had any trouble with a gun with any person, Mr. Hoffman? . . . Q. Did you ever draw a gun on anybody before?’ To which questions the appellant respectively answered: ‘A. I never used a gun on anybody before.’ And, ‘A. No, sir. I never drew a gun on anybody.’ We find no merit in appellant’s contention that the trial court ruled erroneously in each of these instances. The two enumerated questions asked on cross-examination were, in our opinion, clearly within the scope of the direct examination of appellant and therefore proper cross-examination.
“Subsequent to the above proceedings and during the production of rebuttal evidence by the prosecution, the State produced a witness who was permitted to testify, over appellant’s objection, to the effect that three or four years previous to the trial he had been quail hunting on the appellant’s premises when the appellant appeared holding a ‘long gun’ pointed at him; that he proceeded toward the appellant but was commanded by the latter to stop, the appellant saying ‘No, don’t come any closer, if you do I will kill you.’ We are of the view that this rebuttal evidence was properly admitted for it tended to impeach the testimony given by appellant [478]*478that he had led an. untroubled life and had never drawn a gun on anyone. In so holding we are not unmindful of the rules that a witness may not be impeached as to collateral matters, and, that proof of character by evidence of general reputation can be met only by evidence of general reputation and not by specific acts. Neither of these rules is, in our opinion, applicable so as to preclude the introduction of this rebuttal testimony. ’ ’
See, also, the case of People v. Turco, 29 Cal.App. 608, 611 [156 P. 1001], where the same considerations relating to the permitted scope of cross-examination of a defendant were deemed “conclusive in favor of the propriety of [testimony] in rebuttal,” offered by the prosecution for purposes of impeachment.
Despite these well-defined principles in measure of the right of the prosecution to take appropriate steps to test the credibility of a defendant’s statements on direct examination, appellant argues that a different view should prevail where the case concerns the commission of sex offenses. Accordingly, he cites the decision in People v. Rogers, 26 Cal.App.2d 371 [79 P.2d 404]. That was a prosecution for the violation of section 288 of the Penal Code. There defendant, following his specific denial on the witness stand that he had committed any of the acts charged against him, stated in the course of his cross-examination by the prosecution: “I have never been rude to children. ’ ’ Then he was asked whether he meant by that statement that he had never mistreated any children at all, and he answered: ‘ ‘ That is right. ’ ’ The prosecution thereupon was permitted to “introduce evidence that appellant had previously entered a plea of guilty to contributing to the delinquency of a minor (a misdemeanor) predicated upon the charge that he had committed an act prohibited by section 288 of the Penal Code with a female child other than either of the prosecuting witnesses.” (P. 372.) In declaring such procedure to constitute prejudicial error, the court cited as authority the cases of People v. Anthony, supra, 185 Cal. 152, and People v. Asavis, supra, 22 Cal.App. 2d 492, holding, as heretofore stated in accord with the general rule, that such evidence of other crimes is inadmissible where offered for the purpose of showing criminal disposition or propensity of the accused. But the Rogers decision cannot stand on that basis, for it—contrary to the situation in the Anthony and Asavis cases, where the challenged evidence was presented as part of the prosecution’s case in chief— [479]*479concerned evidence introduced for impeachment purposes. Thus in the Rogers case the defendant, by his statement that he had “never been rude to children,” was, in effect, making the claim that he had never been guilty of similar prior conduct as that upon which he was being tried. He thereby invited inquiry into the truth or falsity of his gratuitous testimony. From such standpoint, the prosecution’s responsive evidence in regard to the defendant’s plea of guilt of the other offense was manifestly not introduced to prove “the specific crime charged,” but was offered for the purpose of contradicting the defendant’s statement as to his prior conduct. If the defendant saw fit to place before the jury his own testimony with regard to such prior conduct, it was proper for the prosecution to undertake to disprove the truth of such statement. Accordingly, the case of People v. Rogers is disapproved.
Nor does the case of People v. McDaniel, 59 Cal.App.2d 672 [140 P.2d 88], aid appellant in his claim that his testimony in “opening the gates” for the rebuttal evidence in question cannot serve to establish its competency. There the point arose in connection with improper cross-examination of a character witness for the defense, by reason of the prosecution’s failure to note the “vast difference between inquiring about reports, rumors and the like, of a character witness and questions as to what the witness knows of defendant.” (P. 677.) Such cross-examination, in disregard of the established rules of evidence, was deemed “highly prejudicial” to the defense and the “so-called ‘open the gates’ argument” was declared “unavailing” to permit inquiry on irrelevant and collateral matters as there developed. But here appellant’s voluntary declaration of his good character and unimpeachable moral status in relation to his prior conduct with boys was material to the issue involved, and the prosecution had the right to present responsive evidence which would “tend to contradict” appellant’s self-serving statement “or weaken or modify its effect.” (People v. Turco, supra, 29 Cal.App. 608, 610.) As the matter was considered in People v. Buckley, supra, 143 Cal. 375, at pages 389-390, in connection with the scope of cross-examination, it “would be a harsh rule that would forbid the usual practice of allowing one on trial for a crime to testify, if he so desires, that he has led a decent . . . life . . ., for such evidence certainly tends to show good character,” but when he does so [480]*480open “voluntarily . . . the door to his past,” he cannot complain if the prosecution elects to subject him to further examination in regard thereto for the purpose of testing his credibility. The same reasoning applies in relation to rebuttal evidence offered by the prosecution. (People v. Hoffman, supra, 199 Cal. 155, 162; People v. Turco, supra, 29 Cal.App. 608, 611.)
Moreover, the rebuttal evidence here in question was material in its bearing on the issue of intent. As such it came within the exception to the above-noted general rule, in that evidence of other crimes is ordinarily admissible, regardless of its prejudicial effect, where it tends to show guilty knowledge, motive, intent or presence of a common design or plan. (22 C.J.S., Criminal Law [1940], §§ 683-689, pp. 1089-1112; 8 Cal.Jur, Criminal Law [1922], § 168, p. 60.) So pertinent are those eases holding that where the defendant, testifying in his own defense, acknowledges the physical touching of the child but asserts his innocent intent, thereby definitely placing in issue the necessary element of intent, the prosecution may then introduce evidence that the defendant has committed similar offenses upon a person or persons other than the prosecuting witness in order to rebut the testimony of the defendant on a point material to the establishment of his guilt of the crime charged., (People v. Knight, 62 Cal.App. 143, 146-147 [216 P. 96]; People v. Harrison, 46 Cal.App.2d 779, 786 [117 P.2d 19].)
Here appellant on direct examination was asked whether he had ever committed any lewd or lascivious act upon certain of the prosecuting witnesses, and he replied that he may have so touched them but that such touching was done without any lustful intent. Then to emphasize his innocence, appellant volunteered the sweeping statement that he had never, at any time or at any place, committed upon any boy any such sexual crime as was charged. Such factual situation closely parallels that found in People v. Harrison, supra, 46 Cal.App.2d 779. There the defendant was charged with committing lewd and lascivious acts upon four of his children. On the witness stand he denied that he had ever committed any such criminal acts and protested that all he had ever done was innocently to rub the backs of his children when they requested him to do so. To meet this special defense that his acts were all innocent and proper, it was deemed appropriate for the prosecution to present another [481]*481child, “not named in the information,” to testify as to her father’s criminal behavior toward her. Thus the court stated at page 786: “In view of the fact that the intent of the defendant was an important factor in the proof of his guilt, it was competent to show other indecencies of the appellant committed with respect to still another child in order to leave no doubt of the criminal quality of the act charged in the information. (Citing cases.) Such evidence was calculated to rebut the innocent intent claimed by appellant. (People v. Knight, 62 Cal.App. 143 [216 P. 96]; People v. Turco, 29 Cal.App. 608 [156 P. 1001].)”
Similarly, in the present case it was not until appellant, after making certain admissions, claimed a completely innocent relationship not only with the prosecuting witnesses but with “any boy” with whom he had been associated, that any attempt was made by the prosecution to prove that his testimony in that respect was untrue, by showing the commission of similar acts on his part with other boys. Such procedure accords with the theory that after appellant had denied that acts of touching the boys were done with “intent to arouse [his] passions or their passions,” it was proper to rebut this declared lack of lustful intent by offering proof that he had committed like lewd and lascivious acts upon other young boys. Appellant himself “opened the door for the admission of such evidence, and he is therefore in no position to complain of its reception ... [as] relevant to show intention.” (People v. Knight, supra, 62 Cal.App. 143, 147; cf. People v. Asavis, 22 Cal.App.2d 492, 497 [71 P.2d 307].)
Appellant’s final contention that error was committed in the instructions is likewise without merit. The court, recognizing the factor of prejudice which normally accompanies a sex-offense accusation, cautioned the jury in its consideration of the evidence as follows; “By reason of the fact that charges of the nature involved in this case can easily be made and are often difficult to disprove, I instruct you that it is your duty to examine with caution the testimony of the prosecuting witness. The fact that the charge here made, however, is one difficult to disprove should not deter you from rendering a verdict of guilty in the event that you are convinced by the evidence beyond a reasonable doubt that the defendant is guilty as charged. ’ ’ An analysis of this precise instruction was made in the recent ease of People v. Ahsbahs, supra, 77 [482]*482Cal.App.2d 244, also a prosecution, for violation of section 288 of the Penal Code, upon consideration of the identical argument here raised by appellant. As was there said at pages 250-251: " The first sentence of this instruction fulfills the requirement for the giving of a cautionary instruction in sex cases. (People v. Putnam, 20 Cal.2d 885, 889 [129 P.2d 367]; People v. Lucas, 16 Cal.2d 178, 181 [105 P.2d 102, 130 A.L.R. 1485].) Appellant complains of the last sentence in the instruction in which the jury was told that the fact that the charge is difficult to disprove should not deter them from finding appellant guilty if they were convinced from the evidence beyond a reasonable doubt of his guilt. This sentence did not weaken, modify or detract from that portion of the instruction in which they were told to examine with caution the testimony of the prosecuting witness. The two portions of the instruction are not opposed to each other and the last sentence does not neutralize the first. By the language complained of the court did not indicate any opinion of its own as to the guilt or innocence of appellant, but in fact it emphasized the duty of the jury to be convinced beyond a reasonable doubt before returning a verdict of guilty. This instruction is identical with one that was approved in People v. Arechiga, 72 Cal.App.2d 238, 240 [164 P.2d 503], as ‘an accurate statement of the law of this state on the subject,’. . .”
Equally unavailing is appellant’s objection that the court did not instruct so fully as the evidence might recommend relative to the question of his commission of lewd and lascivious acts as denounced by section 288 of the Penal Code. The jury was instructed that “to constitute the offense” prohibited by said section “it [was] not necessary that the bare skin of the minor be touched [but] the touching, fondling, rubbing or feeling of the body, members or private parts of a minor, under the age of fourteen years, with the intent of arousing, appealing to and gratifying the lusts, passions and sexual desires of either the minor or the accused” constituted “the offense charged in the information, even though such touching, fondling, rubbing or feeling was through the clothing of the minor.” While admitting that such instruction was proper (cf., People v. Ahsbahs, supra, 77 Cal.App.2d 244, 250), appellant argues that it did “not cover a set of facts where there may have been a touching in fun as testified to by” him, “or a touching which may have been accidental while a person was sleeping.” With these matters in the [483]*483record, he claims that the court erred in refusing to charge the jury further that “if you believe from the evidence that there was a touching but that there was not an intent to arouse, appeal to or gratify the lust, passions or sexual desires of the defendant or the alleged victim then you must find the defendant not guilty.” But such supplementary language would have added nothing material to the instruction given by the court as above quoted, and it was only repetitious on the point that the touching must be with the specified criminal intent. The instruction given by the court was substantially in the language of the statute in reference to the necessary accompanying element of intent, and it would be unreasonable to assume that the jury could derive therefrom the impression that any touching which was inadvertent or in the course of a game or “in fun” would constitute the offense in question. Admittedly, as appellant maintains, the supplemental charge “would have done no harm”; and even conceding that it might “have clarified the matter,” nevertheless the court’s refusal to engraft such additional language on an instruction which adequately covered the situation would not constitute ground for reversal of the judgment. (Cal. Const., art. VI, §4%.)
The judgment and the order denying appellant’s motion for a new trial are affirmed.
Gibson, C. J., Shenk, J., Edmonds, J., and Traynor, J., concurred.