when peed out, the hallucinogenic mushroom amanita muscaria still retains it's chemical properties. (this isn't to say that you pee whole mushrooms, or even, mushroom chunks. i'm not sure how to phrase that one, but you know what i mean! ps - i'm japanese.)
anyway, there's this tribe in siberia that takes advantage of this: a wealthy person buys the mushroom, and then takes a piss into a bowl. he then passes the bowl to the next person, who drinks it. then that guy pees into a bowl (or cup, i guess) and passes it on, etc. etc. etc.
i always thought that was a pretty good, utilitarian idea.
pee's sterile anyhow.