I've actually only in the last couple years realized there's a lot of younger guys that like guys older than them even like double their age and I'm not minding it one bit ;) Love hot young guys that are fun, funny, cute, sexy, yet are mature and goal-oriented in their own dimension. Maturity and flaky knows no age men! I'm not entirely sure what it is that attracts young guys to older guys, maybe the experience thing, maybe some latent son-dad thing even lol. That said, I'm not personally into that other than perhaps some bedroom play but I'm not judging either.
I do believe the significant age difference is one more challenge to a rel. than might otherwise be though. Like most the guys have said in here, I say go with it-- we don't really consciously 'pick' what we're attracted to and sometimes that changes. No different than you liking guys with dark hair or that are hairy or even the color blue or certain music genres-- it's how we're wired before we show up on this globe.
Another semi-random thing that comes to mind is, what is it about many gay men who are easily in 40s and higher who lie, sometimes grossly, about their age? Who isn't obsessed a little with youth but come on, please. I'm like ok in general take a guy's online age if their in late 30s and up and add 10 to be real. I say be proud and use the real #. Most messages to that note in my profile are from people that think it's a funny commentary, or are guys in their 40s who like I am proud of their condition and being in their 40s and don't play that game.
However, I did just get one really f****d up message on either here or mh from this 40s ish guy accusing me of having some sort of psychosis, bashing men in their (our) 40s while being obsessed with younger men. Huh? Ha! I wasted more than one email on that hot mess but it came down to "f*** off loser!" in the end.