Okay, to back this up to the basic premise: my question was not about sexual assault. It was about one partner becoming fixated on a particular sex act to the point that they push (verbally, as in "ask, cajole, or whine") their partner to engage in it either when the partner doesn't particularly enjoy it or at least doesn't want to do it as often as the first person does. So, basically, what LW's partner is engaging in minus the part where he doesn't stop.

I can't really address the rest of your comment because, as I said, I wasn't talking about sexual assault.