South Park

Season 1, Episode 4 — Big Gay Al's Big Gay Boat Ride

TMDB episode metadata

Show: South Park

Episode title: Big Gay Al's Big Gay Boat Ride

Air date: September 03, 1997

Director: Trey Parker

Top billed cast: Trey Parker, Matt Stone, Isaac Hayes, Mary Kay Bergman, Mona Marshall, Jennifer Howell

Stan's got a new dog named Sparky. Stan proclaims his pet to be the toughest dog on the mountain. Though while Stan thinks his dog is ready for fighting, Sparky proceeds to hump Sylvester like a little bitch. The other boys taunt Stan about his gay dog and Sparky runs away to find someone who will love him for who he is.

Source: TMDB