Imagine going to the washroom at 3am and you don't notice the cat is in there. You take a seat, only for something to swat at your danglies like a little fuzzy pink pinata.
I had to fight off (metaphorically speaking, wouldn't have dared show any significant aggression - I mean, have you seen those claws?!) my first tomcat from trying to jump in the bowl every time I used it... The little fucker then decided that if the bowl wasn't for him, then he'd nestle in my underwear. Which were around my ankles, of course. He never got bored of doing that... God, I spoilt that cat rotten...
This is extra funny because I am imagining the toilet was closed first, and opened with a motion sensor with the salesperson and customer walked up to it.