This is my first community post on Fandom so sorry if I’m stupid asking this question, but here it is. Rigby felt uncomfortable when Mordecai mentioned, “Did you put your arm around Eileen’s rock polisher?”. I know what a rock polisher is but is this supposed to be a sexual joke? If yes, can you please explain how it is one? I’m just a bit all over the place and can’t find an answer/explanation anywhere so I’m just a bit curious. Thanks for your time!