DD (17) has quite a big group of friends and I've noticed that when they meet up one or two of the boys usually walk the girls home.
So last night a large group were here and every time one of the girls was going a couple of boys - not always the same ones - would walk her back and then come back here afterwards. It was freezing and they must have walked miles. (Before anyone asks I can't drive so dropping them was not an option and DP wasn't here). I know if DD had been elsewhere they'd have walked her home too because it's happened before.
I found it rather nice. Is this still usual or does DD just have an unusually chivalrous group of male friends?