"Her way"? More like "A retard's way". I never fell in the toilet... don't know what you're talking about. You've got to be a fucking retard to fall in the toilet if you're an adult.
I used the toilet seat test as a way of finding a wife. If she falls in she is too stupid to marry. If she bitches about something as simple as putting the seat down for herself she is too much of a pain to marry.
I guess you just get into the habit of it always being down so when you're half asleep you fall in. I just do the neutral thing and put both lids down.