Oh, well, maybe I should just forget about it, and just write Stephen King-like novels or Robert Ludlum-type novels or name-your-author-type novels.
Keep it nice and safe, I guess.
It has nothing to do with keeping things safe. There are plenty of people out there who write books that include topics which are high on the Ick Quotient. They get published all the time.
You have to ask yourself a couple of things. Is this whole bestiality aspect truly essential to the story, or are you just doing it for the shock value? Because quite frankly, when you say "well, if you don't like it don't read it", it sounds like you're not really interested in opinions, you just want to get people's attention --- and there's nothing wrong with that, as long as you're being honest with yourself.
That havign been said, I've often thought the Anita Blake series crossed over into the bestiality genre, because half the people Anita bangs are actually big wolves or cats. Badly written bestiality, but there it is.