when it comes down to sex, everybody has a different "disgusting threshold"... so as with anything else, what is disgusting for one would be nice to others...
about the fine salad-tossing art, I don't see the big difference with going down on somebody... pee comes out of the other orifices as well... and please don't tell me you are against oral too...
it all comes down to hygiene... if you are squaky clean, there is no problem at all... if you stink, there is no way that (or much else for that matter) is going to happen