I feel like interspecies sex and bestiality is kind of interesting. ^^;
If you could breed with animals, humanoid nekoes or furries could be a real thing. :p
Just the chaos of different kinds of sex alone, both the freedom and experimentation on doing something, well, "different", excites me. <3
I wouldn't really call it romantic or a moral right if it's animals in particular, but I feel like people should be able to do things on their own time if the animal is either okay with it or even enjoys it themselves... and finally, I feel like if it's a matter of "health" if something was "unhealthy", there would be such a thing technically as "mortal value" in that even if it affected this world, if a system of punishment existed, it shouldn't carry over to the next life because it's really not that bad compared to actual crimes like murder. :p