Strangest thing you've ever used to masturbate

Wondering what the "strangest" thing people used to get off with. Mine was probably a banana peel. I think I was a 15 yo virgin. VERY horny. Had just eaten a banana, and thought "no point wasting the empty peel". It got the job done, but never did it again. My first gf told me she used to get off as a teen by rubbing her crotch against a clothes dryer while it was running. I wish I could have seen that.