When I was a kid, I had a job that included cleaning public toilets, and I found that the women's side was usually much worse than the men's side. I have talked to others who have had the same experience. My wife and I have found this to be true more recently. When using campground restrooms she sometimes refuses to use the women's, and I stand outside and while she uses the men's.
We seem to have solved the problem at home. She decided that my passive nature was a perfect opportunity for power play. Part of it involves chastity play for me, and I can assure you that it is unwise to attempt to urinate in a standing position while wearing a device. I am not sure if the fact that I sit, and that the floor is clean might not be more why she enjoys our play than the power exchange.