Older men, how old were you when young adult women stopped appealing to you?

I will never forget literally the day after I turrned 30. I was working at a restaurant that had just hired a new hostess. She was 19, blonde, slender and...cute. That's it. She was only cute to me. And by "cute" I don't mean "mmm cute" but rather as in "hi! so you're in school? Nice! Keep it up, study hard, and here's a pat on the head" cute. I met her, looked at her, and felt something I never felt before: I felt that an adult was too young for me in a sexual way, and I felt it on a deep, physical level.

It is so weird, but at some point I think most men get to where women that young just start registering in the brain as "little girls", even though you know they aren't.

Oh, but don't get me wrong, I'm now 41 and I'm still eyeing women from 26ish and up, but 18-21 year olds? Eewww. I mean, I can say they're pretty, just as I can say the same thing about a genet, and I wouldn't want to have intercourse with one of those, either.

How old where you when age became something more significant than a number?