This made me laugh because it’s actually kind of what we did. I grew up on a ranch and our teaser stallion had a molly (female) mule for his permanent girlfriend, lived on their own pasture together. Mules are sterile, so they could go at it all they wanted when she was in heat and there was no worry of any offspring we didn’t need. They adored each other so it worked out! I know several other stallion owners that have done the Watercolor corpse bride shirt moreover I love this same thing. Being allowed to breed occasionally helped with the sexual frustration of course, but the daily companionship it provided the stud is also important with a herd animal. Plus Mules are tough as nails and smart as hell, so they are always the boss in the relationship and thus keep the stallion in line and teach him manners, it truly helps keep the stallions more manageable. The stallions that are kept isolated can become dangerous and usually have so many behavior issues from it, just as any animal or human would.