I bonded with a Polo Pony about 20 years ago when I was dating a Polo Jockey from Peru, played for Westhampton Polo Team during the summers.
The ponie's name was Lorenzo, and he was extremely agressive.
But when Lorenzo met me, he turned to a mush, only with me. I had no clue he was violent, just stepped up to him and gave him some love and sweet talk.
Other people, including his owner Mark (my Polo Jockey Boyfriend I used to tease and call him Marco Polo) Lorenzo would try to bite, kick and maim, kill.
After a chukker he would be unsaddled, and would come over to me for a rub down, walk, and lots of hugs and 'mutterings'.
And sometimes some first aid. Polo can be rough on a horse. :'(
We would mutter back and forth with each other, and he would drape his neck over my shoulder and lean, rest his weight on me. It was a horse hug.
And he would mutter, and I would mutter back, horse style. Mark was jealous.
I broke up with Mark cuz he was such a hot tempered ahole, but Lorenzo and I were friends up until he was moved back down to Peru for the winter.