Finally, Langevin and Lang (1985) studied self-reported childhood sexual experiences in the backgrounds of nonoffenders, of sex offenders of male children, of sex offenders of female children, and of other sexually anomalous males (e.g., exhibitionists and voyeurs). These researchers found that 15% of the nonoffenders, 5% of the sex offenders of male children, 21% of the sex offenders of female children, and 8% of the other sexually anomalous males reported prepubertal sexual contact with females at least four years older than themselves. Also, 4% of the nonoffenders, 14% of the sex offenders of male children, 3% of the sex offenders of female children, and 21% of the other sexually anomalous males reported prepubertal sexual contact with males four or five years older than themselves. Finally, 4% of the nonoffenders, 14% of the sex offenders of male children, 0% of the sex offenders of female children, and 15% of the other sexually anomalous males reported prepubertal sexual contact with adult males.