Human animal roleplay (also calle petplay, ponyplay, ponyism or pup-play) is a form of erotic sexual role-play where one or more of the participants takes on the role of a real or imaginary animal in character, including appropriate mannerisms and behavior, and sometimes a partner will act as another animal, or, in a sexual context, may take the role of rider, trainer, or caretaker (or even breeding partner).