I reckon stuff like this is more common than we ever hear about; perhaps the appeal of it comes from the taboo or novelty of it, as causes appeal in other areas too. I think I did once hear about a study where women were tested and they got pretty turned on my other primates doing the do as well as humans... there's probably a part of the brain that just associates sex, however it happens, with... well... sex. To me, it sounds like you were getting a bit bored of normal porn and it just escalated... with each thing that didn't satisfy you enough, you've found something else a level up, and this is something naughty and exciting?

There's a difference between zoophilia and bestiality though... a big difference. The difference is the mind- any person can be screwed up in the head to such a degree that they perform bad acts, not just on animals but on anybody. The difference is the personality of the person, not the direction of the attraction.

Out of interest, where do you stand in terms of humans dressing up as animals or with animal traits? (If it makes you feel any better, I expect that is, to some degree, a form of zoophilia and one we hear more about).