geez, well now I understand why I actually don't get approached so often.
i've had situations like this though, and i would have just used her like a hand towel until she got the clue and accused me of treating her like a sex object.
on the other hand I have had situations like this were the girl wasn't so attractive, and i just turned them off by talking to her like she was a straight up hoe. sometimes they get turned off, and sometimes, well... that's when things get interesting. :)
i guess everyone is different but i would have a hard time getting a woody if some part of me didn't want to slam it. now have i fucked some fat troll while totally drunk and regretted having to see her face and talk to her when i woke up hung over... sure I have.
did i accuse her of seducing and raping me? no.
having said that do i know gay friends who have somehow fucked their fag hag.... well it wouldn't be the first time.