Enthusiasm, sure she should have full autonomy. Thing is, that's not how it is at the moment.
If we just stopped having casual sex (or any sex at all) until men figured out whether they want to have casual sex OR victim blame rape victims, that'd give the guys a bit more of a motivation to oppose victim blaming.
At the moment, men get to have casual sex because women are trusting enough to be alone with them ... AND get the "get out of prison" card by being able to claim that the woman who went to their hotel room with them therefore must have consented to everything they wanted to do to her.
Don't look at what is theoretically acknowledged to be rape, look at what men are actually sent to prison for. Don't get me wrong, I think it's great that date rape is considered rape by most people now.
However, as long as men don't actually go to prison in significant numbers for forcing unprotected penetration on a woman who had only consented to protected penetration, that whole change in thinking is pretty meaningless in terms of law.
Sure, it makes rape victims feel better when they are not victim blamed theoretically ... but as long as they still got raped, by a man who feared no punishment, I feel the progress is not that great. And as soon as a woman goes to the police, she is still accused of lying, and the whole game of "Yes, that would have been rape if it happened that way, but she cannot prove that it did!" starts.