High Quality Content by WIKIPEDIA articles! "An Elephant Makes Love to a Pig" is the fifth episode of the first season of the animated television series South Park. It originally aired on Comedy Central in the United States on September 10, 1997. In the episode, the boys of South Park try to force Kyle`s pet elephant Biff to crossbreed with Eric Cartman`s pet pot-bellied pig for a class project on genetic engineering. Meanwhile, Stan tries to deal with his sister Shelley, who keeps beating him up.