Problem is younger people, girls especially, tend to be really immature. I couldn't put up with anybody younger. I have problems dealing with people my own age sometimes.
Somebody over 20 also has to be careful of walking into the legal wall with someone under 18. You don't know if her parents will pull the statutory rape card if the relationship goes wrong or if they don't like you. Too much trouble for what its worth. I like older men

More experienced and I don't have to concentrate on teaching them things they should already know