Previous investigations have indicated that the ratio of sex
offenders against female children vs. offenders against male
children is approximately 2:1, while the ratio of gynephiles to
androphiles among the general population is approximately 20:1. The
present study investigated whether the etiology of preferred partner
sex among pedophiles is related to the etiology of preferred partner
sex among males preferring adult partners. Using phallometric test sensitivities to calculate the proportion of true pedophiles among
various groups of sex offenders against children, and taking into
consideration previously reported mean numbers of victims per
offender group, the ratio of heterosexual to homosexual pedophiles
was calculated to be approximately 11:1. This suggests that the
resulting proportion of true pedophiles among persons with a
homosexual erotic development is greater than that in persons who
develop heterosexually.