I am 24 and was together with a 16 year old some month ago. Wasn't much fun though and ended after like two weeks. Now I'm back to the policy I had before: 20 and older is fine, younger girls are really children after all. Or at least there's a difference in life settings that makes it hard to find things to talk about.
But well, if I fall in love with a 19 year old, there's not much I could do about it, is there?