The orgy can be traced back thousands of years. They were practiced by even Cleopatra herself. Ancient man often mimicked the activities of animals. For as we all know, cows like orgies.
Bulls do too.
Cows exist in large numbers. The herd is the means by which all cattle congregate. This includes hoof jobs for males and being hoofed for the females. Every body part imaginable is used for pleasure if possible, whether it be a tail, a muzzle, or a horn. These animals love every minute of the action.