Well, a few people have already mentioned the TV show
The Magicians. I'd like to discuss it in more detail because the show's creators and characters seem to be open-minded about human-animal love. Also, I think it's a great show and I highly recommend it. (It's available on Netflix.) I'll begin with a summary of the show's premise, then I'll review how it handles the topic of bestiality.
The Magicians TV show is based on a series of books, which I have not read. It's my understanding that the books have some pretty significant differences. The show is about some young people in their 20s going off to a secret, hidden university (Brakebills) to study magic at a grad school level. It's sort of a cross between Harry Potter and the Chronicles of Narnia, with a little bit of Peter Pan thrown in, but with darker, with very adult themes.
The main character, Quentin, is obsessed with a series of children's books about a group of siblings from Earth who travel through various portals to the magical world of Fillory where they have various adventures. The characters eventually discover that Fillory is real and are able to travel there. The story takes place both on Earth and in Fillory, with some characters travelling back and forth between the two worlds. The gods of Fillory are two anthropomorphic rams, Ember and Umber. To aid the heros on their quest, Ember offers them his "essence" (a bottle of his semen), which one of them has to drink. ("Have You Brought Me Little Cakes?" Season 1, Episode 13.)
Two of the main characters, Quentin and Elliot, are both bisexual. Quentin prefers women, Elliot prefers men. There's a bittersweet "alternative timeline" episode where they spend their lives together.
- In "Impractical Applications" (Season 1, Episode 6), the senior students put the new students through a sort of hazing ritual. There's a horse involved. At one point the new students are told that they need to take turns blowing the horse. The joke is that Quentin, the main character, seems somewhat willing to do it.
- In "Thirty-Nine Graves" (Season 1, Episode 12), we learn that a group of Brakebills students traveled to Fillory where one of them has sex with a talking horse. It's not a crime in Fillory because talking animals can give consent, although it's still taboo.
- A minor, recurring character is Rafe, the human male translator for Abigail the Sloth, the representative of the talking animals on the Fillorian High Council. Some of the other characters tease him by joking that he's in love with her, which turns out to be true.
- One of the supporting characters has sex with a werewolf (off-screen). He admits that it's strange but also says it's cool "because who get to do that?" On another occasion he mentions having a threesome with two harpies.
- The most significant zoo-postive episode is "The Fillorian Candidate" (Season 3, Episode 12). Elliot learns that his "daughter" is in love with a talking bear. (She's not really his daughter--it's a long story.) Elliot's best friend Margo says she's fine with it as long as its consensual. Although somewhat taken aback, Elliot says, "Well, then, I will say what I wish my father had said to me: I'm so happy you're dating a bear." Margo wins the support of the talking animals who believe that if the can intermarry with humans, they will be treated as equals. (Humans run Fillory even though they are significantly outnumbered by talking animals.)