Theres way too much competition between guys when in their 20s, for the vast majority of guys in their 20s this was the case. It made me too nervous trying to prove I was better or had more stamina than others or whatever more... what's the point.... most guys in their 40s, don't try to prove anything plus they show more affection. this is the reason I prefer guys in their 40s. We all know this doesn't mean anyone in their 20s is exactly like that, but a big percentage of younger guys feel the need show off their skills and brag about it. And yes it's never black and white, there are exceptions for sure.