they should do whatever they feel comfortable with
I don't think it's good or bad either way. Grey looks fine on a man as does colored hair. I wouldn't be picky about that. I can't see my own hubby dying his hair, though. He doesn't care about such things ; )
neither do i.........pretty damn fine in my silver locks ;-)
I`m hitting 40 and have started going gray......And i just don`t care.