I'm developing a crush on one of my professors. I know I need to nip it in the bud, but he is...gorgeous...

But here's my question. I'm 26, and he's a bit older, so we're both consenting adults. But he's my professor and I'm his student, and that makes it off limits. But why is it off limits if we're legally consenting adults? If I met him at a bar, it'd be a totally different story. I just don't understand that aspect of it.

Blah. Why do I always fall for the unattainable?