A Pet Play bottom role. Even though the bull role it’s usually performed by a person with a penis who usualy identify themselves as bottom, can be played for a Top or a self-identified male player using a strap.

Bulls are specifically "milked" for their semen to breed hucows. When played by a bottom, bulls can be “forced” to mate with hucows or to “produce milk” to feed, either other bottoms or a Top who enjoys bull’s milk.