Just out of curiosity, where are you getting your information? If you're actually teaching the subject, I trust you more than anonymous wikipedia editor, but I'm just curious because I've always heard most molesters are men.
Experts agree that male victimization by female perpetrators is dangerously underreported -- and when reported, it is often ignored. Furthermore, they have found evidence that authorities of the past underreported confessions by sexually abusive mothers due to disbelief that mothers could be sexually abusive.
If you want explanations of the problems men face when they admit that a woman had sexually molested them (including rape), take a look at the site mentioned by the author. His own site includes a section on male rape and its underreporting.
For example, according to a 2007 report by the Center for Sex Offender Management, half of all sex offender therapy programs have female patients. "Approximately 3,800 adult women and 2,700 adolescent girl offenders were receiving sex offender therapy services in 2007 -- a number that's nearly twice the number of those served in these programs two years prior." And this is only those women in sex offender programs.
In 1996, the National Center on Child Abuse and Neglect (NCCAN) found that mothers were the perpetrators in 25% of all sexual abuse cases they investigated.
Take a look at Female Sexual Abuse of Children edited by Michele Elliott.