Feminism is definitely not a hate-movement against all sexuality. Feminism is a slut-power movement. The goal of sluts is to have sex with the most immoral men they can find. So sex between all women and immoral men is strongly supported by feminism. There are two reasons for the concept of female sex offenses. One is to give lip service to the idea of equality. The other is that sex between a woman and a man who isn't immoral is considered a crime by feminists. So sex with an underage male is a sex offense to feminists because this male hasn't yet had the chance to prove his immorality. Still, there is no question that female sex offenses get much lighter punishments than male sex offenses.