We're dealing with the same problem...sort of. Just bought our dream home and realized that the master bath's toilet area is stained beyond repair with urine. On the wallpaper (!!!), the tile grout, etc. Bleach helped the grout, but not the wallpaper. It all has to come down. When we toured the house, we just didn't notice it. It's awful and I refuse to use that toilet - even at 3 in the morning. Funny, my husband isn't bothered by it at all.
You obviously have not seen the kind of toilets us guys have to deal with in bars, etc