Eh, it's kind of gross if there's already some water in the tub and you have to stand in it for your entire shower.
What type of bad constructed shower is that? No shower should collect any water, it should go right to the drain, no matter how long you stand in it.. It's not only if you pee, but also all the dirty and soapy water which goes off your body...
It's not only if you pee, but also all the dirty and soapy water which goes off your body... 
