You want a real groaner while ensuring someone gets one’s mind in the gutter permanently? Become a bowler! That’s right!
A Spanish instructor once said to everyone in the classroom that “I know why you (Quema34) love bowling: because your mind is always in the gutter!” ROFL!
While the class did have a laugh at my expense, I still thought it was funny at least, so no “gutter” ball with that one anyway.