I've always been zoo-exclusive and into dogs only. I think it depends on the experiences and the journey you took. In my case, my relationship to humans was destroyed in childhood. At the same time i met a friends family dog and it was the first time i could trust and put down my defense shield. Happened at such a young age that eventually burned in and set my identification for good. And when puberty came...well what do you get interested in....your own species, which you cant really understand or feel comfortable to be close proximity or that species you love? That all never happened conscious and i always believed, since i was raised that way, when the right human girl comes, she will turn that little switch in my head and all will be good. Well, the girl came there was no switch and it was a complete disaster..I loved and respected her as a friend..but trying to be intimate felt like having a doctors appointment at the clinic..no fear all safe...but no feelings, no admiration, no desire for that body. Same goes for other animals.