But yeah, you are right, let's just agree to just not rape each other at all.
I still think he would have only raped them if they had had second thoughts and would have stayed away if they didn't agree at first, making him only a mega creep and a rapist-in-opportunity, but then again, that's only a little better than let's-rape-the-creep.
Thinking about it though, he's probably exactly the sort of person who'd rape a girl that can't give consent (due to drugs/drunk or whatever), so I probably shouldn't mind as much.