Jeri reminded me with this :"I guess they think they're gonna get some sort of toilet seat transmitted disease and hover, in the vain hope that they can actually AIM and hit the water from the airspace above it."
of a time many years ago when I worked at a business school, and made a little extra by doing some of janitorial work...

The secretary was a very nice, 'aware' woman who had a sense of humor, and one day, just after all the students had left and I was getting ready to empty waste baskets and such, she called me to follow her to the ladies room.
   Puzzled, I went in ...and she pointed to the seat on one toilet, where clearly could be seen a pair of dusty sneaker prints. We laughed & shrugged at the fact that the prints were so clear...and that evidently whoever left them had good aim & control! Not a drop on seat or floor. (Still not sure why Lady Anon was worried...we kept the place pretty clean.) I wish MEN took as much care as that woman had.

People's 'personal' habits seem to vary extremely widely...