I'm a man, and choose option B and here is why.
I have no problem putting the seat up to use it, but I use my foot to do so, so my hands don't touch the toilet.
It's not so easy to put the seat back down with your foot once the piss is completed without it slamming down.
Call me a "Germaphobe" but I just don't like em. Luckily this has never been an issue with my girlfriend or I. Frankly I can't even recall ever having a conversaion about this topic with her before.