Monster sex: how far is too far? - Discussion

I originally asked this on the Literotica forums, but I feel it should be asked here too. When it comes to non-human sex, how far is too far?

I'm asking because "An Inhuman Love"
https://www.literotica.com/s/an-inhuman-love-ch-01

In this series, the stories I expect to be writing are:

A) human man has sex with a sexy monster girl (looks female, with monster additions, like wings or a tail or a snake-below-hips body)

B) human female has sex with a sexy monster boy (same sort of story as A)

C) human female has sex with a dangerous/scary/large monster/creature, often with themes of large/deep penetration

I plan on having a mix of A, B, and C's, but the question is specifically about OPTION C: How far is too far?

The first chapter was centaur/human sex, which, when writing out the details of the sex, is basically a combination of two fetishes: deep vaginal penetration, and horses. Now I personally have no issue with writing such a scene, because I both LOVE to write about the physiology of nonhuman to human sex, but also because a centaur is sentient.

Is centaur/human sex too far for my readers though? If I can craft a compelling, romantic and/or erotic situation about a minotaur, would that be sexually appealing to my readers? Giants? Werewolves (while transformed)? Other were-creatures? Or maybe a big, hulking brute of a creature that would put a minotaur to shame with its size and animal hunger? Or dare I even suggest, tentacle monsters? 

I know in the future, I have plans to write about some interesting monsters. One story in particular I want to write about involves:

- extremely deep anal penetration done in a very slow, sensuous, and gentle manner

- the monster is a 12-foot-tall anthro entity, and of course has the penis appropriate to his size

Off the top of my head, the scene would involve something like an Egyptian scenario of pleasure slaves and a god, like Anubis:

https://www.deviantart.com/art/Anubis-691663096

Sometimes I wonder if my ideas are too extreme for Literotica, or if maybe everyone on Literotica is just waiting for someone like me to start writing about these ideas.  :3