In what way, exactly, is leaving the toilet seat up being a slob? And don't bring the lid into this, that's never part of the argument.
The general complaint is that women want the seat left down so they don't accidentally plop down into the bowl and soak their asses in toilet water, but isn't it kind of sexist to imply women are incapable of making sure the seat is down before they sit?
So then the argument continues "what if she wakes up at night having to go, but is too tired to remember to check", except the same argument can be made for men, and then women risk sitting on a toilet seat splashed with piss.