25. Can't deal with younger people in general - not just girls. I used to ALWAYS associate with those well below my age, and it didn't work. We had nothing in common. We weren't on the same wavelength in regards to anything. They just wanted to get drunk, be cool, talk ****, bang hotties, cause drama, complain, act stupid, etc. There was no sense, logic, intelligence, or maturity to be had. Certainly no loyalty, either. Jump from group to group, guy to guy, friend to friend...
I think part of it was the Michael Jackson effect - I was such an anti-social, unkept, overweight, unattractive, inept loser in my younger days, and all of my select few friends at the time were cool and popular and had hot chicks, that I wanted to make up for it later. In MJ's case, he never got to experience childhood outside of the fame and media. I never had any young hot girls when I was in high school, so all I went after once I pimped myself up were young hot girls. They have that pure, clean, youthful look, and are definitely "exciting", but I can't deal with the immaturity, drama, games, brattiness, etc. Not all that is shiny is gold. These girls aren't all there.
Same goes for guys. I wanted to be cool and popular, and that whole lifestyle - once I became part of it - went to complete ****, and resulted in a lot of hate / anger / bitterness / resentment for years to come. But, I did accomplish all those things - even though they weren't worth it, and realized I wasn't actually missing out on anything... Except for good things.
But, its not just age - moreso mentality, lifestyle, and maturity. But, most older people who still act young associate with younger people, and try to be cool / popular, and fit in with all the drama, so that's a pretty good giveaway. Mostly, people who never grew up act this way, and attract what they are. Even if they're bar-hopping *****s in their 30s - they're still children, and associate with other children in an adult pub.
While nothing is concrete, you go where the odds are in your favor. Most older people are mature, intelligent, insightful, experienced, thoughtful, etc. That's what I go after. Or associate with for the time being.