I had a friend in high school who once used a hotdog. Turned out very embarrassing for her, because the hot dog broke while using it and she had to go the the emergency room to get it removed. However, it must of not be so embarrassing because she came to school telling us how it happened.
If it were me, that is not something I would tell even my closest friend.
As for me the weirdest thing would have to be my cell phone and a highlighter.
Oh geeeze... every kind of marker I think Crayola, Sharpie, etc. Toothbrush, hair brush handle, tampon. Yes a freaking tampon.
A knife handle, I wrapped the blade in a towel. UBER unsafe please people don't masturbate with knives.
Thank god I have sex toys now......