That's very true, not all "older" men are more mature, and it does also depend on how much older.
In my case, Dan is 38 but acts 12 sometimes LOL. He is sweet to me and he very sarcastic and immature at times.
Though, I still feel a big attachment and connection to him.
I think some it may as well be experience, it's very reassuring that the person you're with knows what to do because he has probably been in that situation before, and I am talking any situation not just sexually.
I wish some men would get on this forum and post their thoughts on the matter.