Do what @Wirey did.Not really "jokes" per say, not until morphed into them, but a girl who inserts tampon, applicator, and plastic wrapper without even opening it, the story doesn't need much "engineering" to be made a joke. Other than that, not really.
Get a tampon and a bottle of catsup.
When the ladies room is full, drench the tampon with catsup. Race into the bathroom licking it, look around at the women, then throw it in the trash. Saunter out.
At least someone told me Wirey did that. I might be mistaken.
Tom