Let me start with the thought it's never too late. I'm 60, fairly large with white hair- not exactly prime game in the sex dept.
I have a 22 year old son in a local community college who lives in a small apt above the garage which he calls his 'love nest'. He keeps things pretty low key- he is not a partier, studies hard , gets good grades , and has a girl friend and the normal things I would expect a 22 year old to have and be.
Last weekend he asked if he could have a film/gaming overnight and have some friends stay- his real question was if I would feed them all and I said no problem- I recognized all the names and had met the kids and they were all nice.