What I am clumsily getting at is that it's not always clear when sex is consenting or not. Here's a better example. Drunk college chicks. Let's say a college chick gets smashed and ends up hitting on a guy whom she would normally never think twice about screwing. She's not thinking rationally, yet, in her drunken state, she is obviously willing (though sober, she might disagree--emphatically saying that he may have even raped her). You and I would probably agree that she is consenting, even though she was in an altered state.
In the UK, that is legally rape now (I am fairly certain that law passed).
It is the man's responsibility to judge whether or not the woman is sufficiently intoxicated to have her mental state altered enough to not have the ability to rationally consent to sex.
I'd like to know people's reactions to that.