This reminds me of something I've been thinking about recently.
There aren't really any videos of full size horses mounting women (the Horsecore video is probably the only exception). There are plenty of videos of women using a somewhat erect horse penis as a dildo. There are some mounting videos, but typically those (somewhat bigger) girls are taking ponies or miniature horses.
The reasons are somewhat obvious, a horse is simply too big for a woman. But from what I've read the problem is the length of the penis, not the girth (for girls who can take that kind of girth). That and you would be hard pressed to find a human who could withstand a full size horse landing on their back.
There have also been various contraptions theorized, harnesses and whatnot, that would supposedly facilitate mating between a horse and a woman. I've never seen any of them realized. But I've also never read of anyone proposing the kind of device I have in mind, which is weird to me because it seems really straightforward:
You start with a breeding mount, one with an artificial vagina. Like this one
But you modify it as necessary so a human can fit under it in doggy style (horsey style
) position. You position the person inside in such way that the artificial vagina on the outside will guide the horse cock into the real vagina (or a butthole if you prefer). Such a device would increase safety in two ways - it would allow the horse to mount without crushing the person below him, and it would limit the length of the penis entering the orifice. You could do a test with a horse cock dildo beforehand and set the distance to something the human being mated can take.
And voila, you now have a full size horse mounting you and thrusting into you, spraying his cum inside you, with the added benefit of not tearing your innards to shred.
Do you think something like this could work?