This is when you are beating off in the shower but want it to all go down the drain so you don't have to clean or get found out so you get down on one knee. This looks like the 'Thinker' pose done by pro wrestler Bo Dallas before his matches.
I was staying in a hotel room with another couple but had to relieve myself. So I had to 'Bo Dallas' in the shower so they wouldn't be creeped out.