It's a man thing, it looks stupid and it's not necessary, my ex didn't wear socks with this birkenstocks! I have certainly not worn socks with my sandles since I was about 6!
Sorry ShelleyS, like I said "Because it doesn't look nice" is not an argument for me :-)
Anyway, my fiancee says the same thing as you... I think that in future, when some equal rights for man movement will emerge, then one of the top slogans would be:
1. Every man has a right to wear socks with sandals!
2. Further, those socks could be different!
Probably political correct compromise would be: one leg with sock, the other without ;-)
In France, you don't care if you are cold / warm, you just HAVE TO BE fashionable. But you can also be comfortable AND fashionable
Huh, and I've thought that France was a free country ;-) fashion slaves...