We have kept horses for as long as I can remember. We don't keep stallions and all our males are geldings, so each summer we would rent a stallion to impregnate our mares. Generally, the stallion would stay over the summer and assume control of the herd while he was there. This is one of them - an unusually friendly animal, since it was actually possible to approach him. One very temperamental beast didn't hesitate to attack humans and I still remember vaulting a fence with him hard on my heels after I innocently went to pick bilberries inside the large enclosure where the herd was kept.
From my collection of photos taken on film.