I know...I may as well be holding "I'm a uptight loser who hates fun" sign, but I just want to vent here. I have OCD. I really, really hate any kind of toilet humor, or gross-out humor in general. ...
Never bothered me just toss and forget, maybe we'll get something like a litter box with "fake grass" in it one day. That all animals use though I don't think its a "humor thing" People want their sims and pets to be as real as possible both with and withou mods, everyone has that sort of business to take care of.