If you didn't know it, there is a Simpsons Marathon going on right now, and I happened to tune in to one of the horse-related episodes. I found this excerpt on Youtube. To set up this video, Homer and Bart are under the gun to get a mare in foal to a stallion. The desired stallion is gay, and in desperation they introduce the mare to another horse and try to make the romance happen. This is a hoot.