Rape is also self-evidently a crime of sex. Without erection, there can be no rape. Without sexual arousal, there can be no erection.
Rape is a crime of power and sex together, often driven by buried anger.
One study found that eighty percent of rapists motivated by displaced anger came from female- headed homes. We can see this as lack of proper male socialization by fathering. We can also see it as inability of the boy to experience maleness as powerful in a nurturing way. Or we can say female domination in childhood triggers revenge in adulthood. I dare say they're all true.