[overpaidgoogler]

Despite his verbal ineptitude, at six-foot-two Eric is one of the more desirable seniors, and many sophomores would, I suppose, have been flattered by the attention... [I asked] "What you're saying is tantamount to saying that you want to fuck me. So why shouldn't I react with revulsion precisely as though you'd said the latter?"

If she found him attractive, why would she react with revulsion at the suggestion of sex. The problem is not with rationality, but rather with her half hearted commitment to it. If you are going to think critically about the true meaning of asking someone on a date, then you should also think critically about the true reasons why asking for sex directly is considered rude.