The puzzling ruination of a public toilet by a shitter before you. As the offender could have been ANYone before the discoverer, hence, Schrödingers Shitstain.
"Don't use that fourth stall, bro -- Schrödingers Shitstain alert! And no, in the immortal words of Shaggy -- it wasn't me"
"If I find a Schrödingers Shitstain again after the barbeque this weekend, I'm gonna lose it."
Having your (gay) partner secrete out their
feces (preferebly in a stick shape), then
covering the feces with wax and inserting a
firecracker in said wax.
Next you must let the wax harden before inserting it into your (gay) partner's anus and lighting the firecracker.
After it explodes you proceed to take it out of your (gay) partner's anus, then proceed to suck and lick the feces (inserted inside) like a popsickle.
Have you heard of of That oneAnal'bro's shitsman candlepiece ?