"wet and messy" is actually the square you use if (for some ungodly reason) you actually want to write scat. So yes, it is as bad as it could get.

Why does everyone consider foot fetish as such a horrible thing? Is there something about it that I'm not parsing? I mean, I don't have the fetish myself, but there's nothing so terrible about feet.

Animal play incorporates everything from animalistic behavior (growling, kneading, turning around three times before laying down, whatever) to things like puppy play and pony play to out-and-out bestiality. So it can be really innocent... or it can be really awful.