Danny Doolen was charged with and jury-convicted of the crime of sexual abuse in the first degree, § 566.100.1(2),1 and was court-sentenced as a prior offender to three years’ imprisonment as punishment.
On appeal, Doolen contends the trial court erred in denying his motion for judgment of acquittal filed at the close of all of the evidence, and in submitting instruction No. 5 (verdict director) because “there existed a material variance between the charge as specified in the bill of particulars and the proof adduced at trial, in that the bill of particulars alleged that appellant had subjected the victim to sexual contact by touching his genitals, but the evidence at trial established that appellant had caused the touching of his genitals to the victim, and instruction number 5 was premised upon a finding that appellant had caused the touching of his genitals to the victim.”
We hold that while there was a variance between the specifications of the bill of particulars and the proof adduced at trial, such variance was not material to the merits of the cause or prejudicial to the preparation of Doolen’s defense. We affirm.
The information, amended to include the allegation that Doolen was a prior offender, charged that Doolen, on a date between May 20 and May 30, 1986, committed the crime of sexual abuse in the first degree by subjecting J.F.S., a person less than 12 years old, to sexual contact. Sexual contact is defined in § 566.010.1(3) as “any touching of the genitals or anus of any person, or the breast of any female person, or any such touching through the clothing, for the purpose of arousing or gratifying sexual desire of any person.” Committee Comment to that statutory section, which is based on Model Penal Code § 213.4, states that the definition is intended to cover not only the usual situation where the actor touches the sexual areas of the victim, but also covers the situation where the actor causes another person to touch him.
Following the filing of the information, Doolen’s attorney moved for a bill of particulars, as is authorized by Rule 23.04, seeking information as to the time, place, date and method of sexual contact made by Doolen. The prosecuting attorney’s written response stated the offense occurred in the late evening hours on a date between May 20 and May 30, 1986, that it occurred in the home of the victim’s grandmother in Webb City, Missouri, and that the sexual contact claimed was that of Doolen “touching the genitals of [J.F.S.] for sexual purposes.” Defense counsel also initiated pretrial discovery, and obtained from the prosecuting attorney a sheriff’s report detailing the investigation of the incident, as well as a statement given to the authorities by the child regarding the sexual abuse. The sheriff’s report stated that the child told the investigating officer that during the night in question, which the boy was spending with his grandmother, Doolen, a 31 year-old man who was the child’s cousin and lived at home with his mother and aunt (the child’s grandmother), got in bed with the boy “and from the rear or back, Danny began hunching him, and kissing J_on the mouth, and ... with his hands, started rubbing J_’s hot dog (penis), through his shorts.” In his statement, the boy said Doolen had “hunched” him with his “[h]ot dog and behind” and rubbed the child’s “hot dog.”
Doolen’s attorney also took the child’s deposition, and had the opportunity to question the boy further regarding the specifics of the sexual contact, but failed to ask questions relating to specifics. In addition, the child testified at the preliminary hearing, where the opportunity to cross examine was present. The transcript of the preliminary hearing was not filed as a part of the record here.
At trial, the only evidence of sexual contact by Doolen with the child came from the boy’s testimony. He testified that Doo-len rubbed his “ding-dong” on the child’s “behind” and was “rocking back and forth,” and that Doolen was “rubbing my *385tummy and kissing me.” He denied that Doolen rubbed or played with the boy’s genitals. Doolen did not testify in his own defense, apparently because of his prior record as a sex offender, which fact probably would have been brought out during cross-examination. His defense, supplied by his mother and aunt, was that no type of sexual abuse of the child by Doolen could have occurred because the boy never spent the night in the grandmother’s home at any time during the dates alleged.
The child’s testimony at trial, in which he used the words “ding-dong,” “behind,” and “rocking back and forth” in describing Doolen’s actions, was sufficient to establish that Doolen deliberately rubbed his genitals against the child’s anal area for the purpose of arousing or gratifying Doolen’s deviate sexual desires. See State v. Eastin, 735 S.W.2d 50, 53 (Mo.App.1987); State v. Moore, 721 S.W.2d 141, 143 (Mo.App.1986), and State v. Edwards, 657 S.W.2d 343, 346 (Mo.App.1983). As such, it supplied all of the elements of the crime with which Doolen was charged.
The only question to be decided is whether the variance between the explanation in the bill of particulars concerning what method Doolen used in making sexual contact with the child, and the method described by the child in his trial testimony was of such magnitude so as to mandate reversal. We think not.
The purpose of a bill of particulars is limited to informing the defendant of the particulars of the offense so as to enable him to sufficiently prepare his defense. Rule 23.04; State v. Davis, 685 S.W.2d 907, 913 (Mo.App.1984). A bill of particulars is not a substitute for an indictment or an amendment of an information. United States v. Francisco, 575 F.2d 815, 819 (10th Cir.1978). It does not cure an invalid indictment or information, State v. Hosier, 449 S.W.2d 881, 885 (Mo.App.1969), but merely describes with greater particularity the essential facts contained in a valid information or indictment. Rule 23.-04. Before a variation between the assertions made in a bill of particulars concerning the details of a crime and proof on the point offered at trial can be regarded as prejudicial error, it must be prejudicial to the defense of the defendant, in that it hampered his ability to sufficiently prepare his defense, and was material to the merits of the case. State v. Wise, 745 S.W.2d 776, 779 (Mo.App.1988). Such was not the case here.
Doolen’s defense was, in essence, an alibi since his witnesses testified the child had not been in the home during the timeframe in question and, therefore, the incident could not have happened. This defense was equally available to him, and was equally applicable, both before and after the filing of the bill of particulars, regardless of which version of sexual contact the state’s witnesses testified to at trial. The variance did not hamper Doolen in the preparation and presentation of his defense, and since it did not, he was not prejudiced by it. See State v. Edwards, 672 S.W.2d 347 (Mo.App.1984) and Lane v. State, 565 S.W.2d 186 (Mo.App.1978).
In addition, the variance was not material to the merits of the case. The crime alleged was sexual abuse of a child by means of sexual contact. While the method of prohibited sexual contact may vary, as is witnessed by the statutory definition, here the variance was so minuscule as to almost amount to a non-variance, and was immaterial in view of the type of defense that was presented. It is also noteworthy that defense counsel, long before trial, by reason of possession of the sheriff’s report and the child’s statement, knew that the state's proof at trial, or at least part of it, would be the type of testimony that actually was forthcoming and, therefore, came as no surprise to the defendant.
Since the variance was not prejudicial, the trial court did not err in denying the defendant’s motion for judgment of acquittal, or in submitting instruction No. 5, which was the verdict directing instruction based on the state’s theory of the case.
The judgment and sentence of the trial court are affirmed.
CROW, P.J., concurs. HOLSTEIN, C.J., dissents, and files dissenting opinion.. Unless otherwise indicated, all references to statutes are to RSMo 1986, V.A.M.S., and all references to rules are to Missouri Rules of Court, V.A.M.R.