You have set a boundary with your husband which is your right and he is disrespecting the boundary and in doing so he is disrespecting you. That said, it is my opinion that the many of the people responding to your question are either doing some projecting or have confused the issues of sexuality and boundary crossing.

Wanting to touch ones wife in her private parts when she is bent over does not make someone abusive, a sex addict, in need of therapy or have issues. Touching ones wife in a way she says makes her uncomfortable and after she has asked you to stop DOES make one abusive, in need of therapy or simply means they have issues.

I don't know if you are a prude or not, I don't think any of us do and I don't think you've given anyone here enough information to make that determination - but having a boundary regarding being touched in your private areas doesn't necessarily make you one. I've talked to my wife about it and neither of us find it offensive but we don't have to, it's not our body it's yours.