I do know that bidets are often a target for humor. I remember in the movie Get Him to the Greek, Aziz Ansari and Nick Kroll sing praises after using Jay Z & Beyonce's his and her bidets at a party.
Comedian Bill Dwyer has a whole skit about using a bidet.
Bidet humor isn't a recent development. The first time I ever heard of a bidet was in the 1986 movie, Crocodile Dundee. Bidet, Mate!
I don't know what it is about a bidet that makes it so funny. I guess because we don't have them here in the US? I know I've never seen one. Have you? Have you used one before? I think I'd give it a whirl if I ever came across one.