foolishness vs good

I think this is a wrong way of thinking. I don't believe anyone is ever done doing stupid things. What happens is, at some point, we feel like we can share the foolishness with someone else and have fun together or even take responsibility afterwards. I don't ever want to stop doing childish things but I want to do them with my significant other or friends. Now if by "foolishness" you mean something like "cheating" then that's entirely up to the person's goals and a large proportion never stops even when they're "settled down for good".

I guess that would depend on how you define "foolishness" and what it means to "settle down for good".