I'm assuming (big leap here) that animals all make, essentially, the same kind of pee. Fish pee is ammonia (among other things). Human pee is ammonia (among other things).
If fish pee is comprised partly of urea (two ammonia molecules stuck together) and is usable by the nitrifying bacteria in an aquarium, than human pee (which is comprised partly of urea which is usable by the nitriyfing bacteria in an aquarium) should be roughly equivalent.
Would it then (barring the disgustingness of peeing in your aquarium [via cup or not, still, ew.]) be safe to say that human pee would bring about the same biological processes that occur in a fully matured tank the same as fish pee would?
If that's then true, then i'd suggest any open minded individual who's lacking in sources for ammonia for fishless cycling to:
Pee in your aquarium.
PS Has this ever been tried? I think this might warrant further research!
Edited by InaneCathode, 01 December 2006 - 09:57 AM.