The following is possibly NSFW and discusses topics not mentioned in polite company.
I've discovered a problem with these new flush-free urinals.
Pubic hair.
That is all.
(Ok, not all. For those who aren't aware, there's a new trend in urinals which use some sort of a gelatin which supposedly contains microbes which prevent odor; they just have to wash them down occasionally. I've been seeing them here and there over the last year or so. They actually seem to work pretty well at the whole saving water thing while remaining relatively clean, as long as only urine is put into them. Unfortunately . . ..)