Maybe market analysis is showing these ideas are more popular in entertainment than anyone wants to admit. So someone is trying to attract and please those viewers ?

I would sure love to see the test runs with men and women all hooked up to penis erection measuring machines, which really do exist, and vaginal dialation and lubrication measuring machines to get honest sexual arousal statistics from groups of viewers. More people likely turn on to castration and dick destruction than ever want to admit to it.