I don't think age should be a valid social measurement of anything meaningful. It's experience and maturity that counts.

How does one gain experience except by living longer than the next guy? I am 56 with 56 years of experience but the level of experience varies greatly. I know just as many idiots my age as I do guys who have tremendous experience. I guess what I am saying is the experience has to be meaningful and the person has to be able to share it without pissing off the person he is trying to share it with.

Social anything is irrational because society has become irrational