Yes, there are more ways to sexually abuse but abuse is usually about power, not sex. Take away a man's power and you would take away his "interest" in abuse I think. No pride or control there having to use hands or mouth. It reminds me a little bit of of flashers and how if children/little girls are taught to point and laugh that "deflates" and embarasses them as they are in it for the shock value.

I don't know what I would do about women abusers, teachers or care-givers, etc. as their abuse is about control but, as you say, there's hands and mouth for them, no "obvious" sexual symbol of their womanhood/"control". And, castration doesn't take away sexual urges like it would for a man. I don't know that I would castrate a man; I'd be a bit more punitive and leave everything intact, they just wouldn't ever be able to get their penis "up" and hard; would have to hold it up with both hands even to pee. I'd humiliate them for their misuse of that organ.