It is both flattering and disturbing to have a 14-year-old boy tell you that he thinks you're hot. Really hot. Flattering because it's nice to know that you're desirable, disturbing because he's FOURTEEN. 14! Four. Teen. In fact, it's more disturbing than flattering, which is why I won't touch him, if I ever did. I just can't do that. It's kind of cute, but I want to say "um, sweetie? Please don't. I'm old enough to be your mother! Save it for the girls your age!"
Bless his heart.
The youngest I can go with any seriousness is 21, and that's entirely dependent on the personality and maturity of the guy. I know men in their 30s who are morons, and men in their early 20s who have all the qualities I look for. I sometimes feel, however, that I've been relegated, through no conscious effort on my part, to sister, best friend, or admired-from-a-distance status. It's kind of obnoxious, but there it is.
Maybe there are good reasons I didn't end up being a high school teacher... Not that I'd ever DO anything, because I definitely wouldn't, but it's difficult knowing that teenagers are attracted to you.