"The real reson they want it left down is this: If you leave it up, they might, absentmindedly, fall in when they try to sit down...possibly even injuring themselves...in fact, I would guess that 100% of the women who complain about the seat being left up have fallen into the toilet at some point in their lives."
So, from what your saying, my woman shouldn't have a problem if I pee on the half-mast toilet lid when I'm stumbling around half asleep, cause I saved her butt from a worse fate already. Yeah, that's gonna fly.
And what's with those damn scented fuzzy toilet covers? They won't let the seat stand up on it's own, so there's no way to hold your beer, and your wanker, and the toilet seat at the same time!
It is in this context that I have used the verb "to leave" with respect to the toilet seat. If you are a male, you place the seat into the "up" position to urinate, and then you "leave" it down when you are finished.
As to the covers, they must be quite thin and not too shaggy or they will indeed fall, imperiling one's manhood, possibly rendering moot any discussion of toilet seat placement.