As a man gets older, he seems more harmless, even neutered. At 66, I can now have much more substantive conversations with (for example) young women.

Advice: some lessons come only with age. People often don't learn not to care what other people think (because they're not thinking of them at all) until their 30's. It was only recently that I really learned that if you don't have expectations, you can't be disappointed.