LogFAQs > #973086140

Pee is gross, sure, but you are still more likely to get piss on yourself that stays there from using a urinal than you are from peeing in the shower.

If you're going to use the comparison of cleaning shower to toilet, then go ahead and see which one builds up grime quicker - it's the toilet. Turns out that running water is actually pretty good at keeping things moving. Not foolproof, no, but pretty good. But that's all negligible because, again, you're washing yourself in the shower anyway.

Belief that using a toilet is less gross is just ingrained societal connotation. I mean, if the key element is "piss is gross", then only one of the options so far is best at you coming away cleanest.