I'm obviously in the minority here and I've gone back and forth on this one. Do I think my urine spooks deer? Nope. I think it raises their curiosity and that's what I'm trying to avoid esp. when the source of the curiosity is directly beneath my stand.
"If", (I don't) I was using a scent station such as doe in heat or rutting buck type of scent I wouldn't place it directly underneath me. I am willing to bet that any mature buck or doe for that matter that catch's a wiff of your puddle of pee will pay attention to it and once a mature deer pays attention to a scent they "will" pinpoint the source of that scent. I've been at this for over 40 yrs. and on average for the last 10 yrs. i've spent over 60 days a season sitting in trees and I can guarantee you that you will pay dearly sooner or later from peeing out of your stand. If your willing to accept the consequence's let it rip.
Dan