Seafood Restaurant Prank

Listen up, buttercup. This joke is for people who like to play silly games in relationships. The girlfriend pulls a prank by not wearing pants. The joke then uses the word "seafood" as a double entendre. It means food from the restaurant, but it's also a crude slang word for... well, you know, female private parts. The punchline implies she's exposing herself, and he's wondering if she's having fun without him. You probably had to think about it for a second, didn't you, genius?