Gay beastiality yiff bondage fantasies

I know that the only real taboo here is beastiality and I know that none of these fetishes have anything to do with each other... But for me, they are all related to the same two fantasies.

The first fantasy I have is being bound face down at a 45 degree angle (head should be about 3 ft off of the ground) in so strict of a manner that the only things I can move are my hands and feet (I'm forced to face forward by a pole under my chin). I'm in front of a crowd and having a horse anally penetrate me while I am ridiculed for it in a roman style colosseum as a form of punishment. I like the idea of being so full of horse cum it actually pushes the horses penis out of my anus after which the horse reenters splattering the cum down my legs and sometimes even a bucket I will later be force to drink and be completely covered in. (Sometimes I am muzzle to muzzle bondaged to a woman which in this case I am a human male or female and am greased up in horse cum). Other times I imagine being a wolf anthro and my canine ears being pushed down by the chest of the horse. Sometimes I also have a muzzle in this one often metal,but sometimes plain rope or leather.

My second fantasy is being collar chained to a cement dungeon floor and having my limbs bound so that I'm on all fours with a muzzle over my mouth and having two guards use me to relieve a sexually frustrated guard dog. This dungeon would be under the colosseum and in this case I'm a human male with female breats. The dogs penis would penetrate anus while I silently cry. And sometimes I am forced to suck off a second dog or one of the male guards. I like the idea of being forced to breath in his chest scent through the puppy shaped mask while having his penis rub against my breasts and my penis fondled by his feet. I also like the idea of a dogs feet excitedly kicking my breasts while his penis is rubbed against my neck or in my mouth. Sometimes I eve go so far as to imagine being copulated in my eyes or hair.

Both of these give me the highest pleasure when I rub my stuff on the bath room floor (the fact it's considered dirty and degrading turns me on too). The cold tiles and having the lights off really make me feel like I'm in a dungeon. I can't get off by rubbing my penis with my hands, I need to be lying down to orgasm.

Anyway, I want to know if I should stop thinking this way, why I should and what you'd suggest in order to stray away from these fantasies.

I also would really appreciate your psychoanalysis of such specific fantasies. What do you think these could be correlated to and how they may have developed into something so specific.