I worked on a horse ranch as a summer vacation deal force upon me by my folks who had it in their head I was going to be a rancher, never happened in the end.
Anyway, one of the many duties I had to help out in was assisted mating and I’ve run into quit a few mares and even studs who enjoyed having a hand and arm shoved up their back ends. Flushing a mares womb often required having a hand up their ass to control/fell out the womb when flushing the zygote.
When it’s removed it is then transferred to a whelping mare, similar process but with injecting it and she carries the foal to term and the breeding mare comes back into heat and is once again impregnated.
I remember one black mare who couldn’t wait to have her butthole touched and she would even back herself onto your arm if you let her and all the way back to the elbow. Her pussy would wink out of control and she would always orgasm the moment she got something shoved up her butt.
Oddly enough, she didn’t like vaginal penetration and needed to be hobbled else she would kick the stud, very dangerous and could even kill the stud if she kicked him just right. Wouldn’t even let anyone touch her pussy but when it came to her butt, that’s what really excited her. Also yes, accidentally anal happened during matings but that was something heavily ensured didn’t happen else you’d get your ear chewed by the ranch owner for letting the stud waste his money making seed and possibly damaging a money making mare.
Also, yes I’ve fisted her when no one was around and kept her happy!
With studs their was one brown and white stud who was a bit of an up and down with mating. He’d get all excited with teasing the mare but when it came to mating he’d lose interest and refused to mount. When this happened he needed to have his butt fisted so as to stimulate him to release some seed for ejaculation. Yes we tried other means and even jerking but he’d go soft and so…butt fisting was the end result. Did he like it?
Hard to say but he never resisted having a hand shoved up his butt and would get kicky if you touched his balls or dick. Once hobbled he’d have a collector placed around his junk and someone with skill in manual stimulation of a studs prostate would come in and do his job. Didn’t like the collector but always lifted a tail for a hand up his ass, didn’t move or resist.
Coworkers would joke he had his butt fucked but older studs when he was colt and developed a taste for it, no idea if that was true or not, most likely not.