I'll buy into washing your hands before, but you do also wash after?
I remember many, many years ago (1982) in Baltimore Harbour in Phillips Crab house. I was in the Navy and the ship was moored right in the inner harbour so the bar was full of Brit Navy boys, much to the enjoyment of the local women and chagrin of the local men. I went for a pee and while in there one of the lads off the ship took a leak then just started chatting. This dufus doodles made the comment, "In America boys are taught to wash their hands after going to the bathroom", I chipped in, "In England boys are taught not to piss on their hands" It just wasn't his night. Happy times, happy, happy times!