I have been hit on by men three times. The most recent two were awful. Like, it was so bad I felt sad for the guys they'd go on to try to pick up after me. It made me reflect on hitting on people entirely, separate from gender or sexual orientation. It was just clumsy and awkward. I was cool about it, but damn.
The first guy was fucking cute, though. If I was gay, I would've given him the time of day. And he was pretty smooth about it all, too. The only thing, though, is that I was at a college having my transcripts sent to apply for doctoral programs and was teaching at a local community college. He looked young enough to be an undergraduate, and remarkably similar to a student I once taught. Not that I'm old (I was 25), but if he was a freshman, that'd make him 17/18, and I'm not sure that I'd wanna date someone that young.
That and the whole straight-with-a-girlfriend thing.