I had my first experience working a summer job at a horse ranch..
A little Arabian mare. She always just seemed to enjoy being around me.
She started keeping her ass close to me and lifting her tail.
I noticed her pussy right away, and couldn't stop staring at it.
At some point, I reached out and touched it, but stopped myself from going any further.
Evidently all that did was encourage her, as she started following me around in reverse, tail lifted. Even when I was cleaning a stall next to hers, she'd have her ass as close to me as she could get it. I'd move, she'd move.
That was enough to get the courage to finger her, which again only made her pursue me even more.
Finally one night I snuck out to the barn and fucked her.
Not sure how many times I did that, but I never stopped thinking about her in the decades that followed, and caught myself looking at mares while driving down the road. Also found myself fantasizing about just getting a horse.
Thar never happened, but a few years ago, my then wife and I were getting kinky in the bedroom and our male GSD decided he wanted to include himself I'm the festivities and that opened up a whole can of worms in my mind, that along with other things was used as fuel for the marriage to fall apart.
Now it's just me and the dogs, and I can't say I'm unhappy with the situation.
I'd love to one day meet a woman that is into it, because women also turn me on, and I really find the trust factor involved in something like that very attractive, but for now, having my boy's knot in me is so much better than being single or living a lie in a relationship.