I’ve known horses who liked certain human traits, not just the man/woman thing. For sure they have preferences. I used to check out all the horses we’d buy at auction for use on my cousin’s ranch.
There was one in particular, named “Vandal” who took an instant dislike to me. Instant. I rode him into the field about 20 yards, could feel him kind of “winding up” and brought him right back. Told Cousin Henry the horse did not like me.
A while later, the girlfriend of our hired guy picked Vandal for a ride. He bucked her off. Both she and I are good riders, so it wasn’t like we were rough on him. He was a misogynist horse! He was always fine for men.
My Arab started out as a ranch horse, The Hispanic guys were drawn to him because he was grey and flashy. However, Gallito had to be ridden with finesse, something our hired help lacked. I could get on him and do anything with him. After one such episode – Juan and I traded horses after Gallito refused to cooperate – and Juan gave me this questioning look. “Guy” went from a spinning, hopping fool to a quiet Ladies’ Horse. I told Juan “Guy” just liked women.
“Guy” took it a step further, though. He loved blondes. He especially loved blondes with a British accent. My instructor at the time was a diminuitive blonde British lady. He gravitated to her. At one point, I considered selling Guy. It so happened another blonde British lady came to try him. He was smitten! She, however, had her back thrown out by his uber-bouncy trot. No sale. I kept him. Considered dyeing my hair and affecting an accent.