I think a lot of things folks think are deer hunting "rules" are kinda ridiculous. I used to be hooked on hunting shows and magazines, had to buy the latest and greatest gear and worry about scent control. After 30 years of observing wildlife and a whole bunch of close encounters, I wear whatever and just pay attention to the wind, kind of..... I pee wherever the mood strikes, so to speak
that being said, I think some deer are just nervous, and anything out of the ordinary will turn em inside out