I can see that logic but I still dont agree with it. If the toilet seat is up and I need to put it down to have a **** then thats what I do. It takes a second at most.
So if i dont mind that then that evens the odds up and the girl can just deal with it and shut up.
I've been in peoples houses where the wife/girlfriend has had a go at the guy for leaving the seat up and it makes me grind my teeth it's so unimportant.