Gelgamek

"Yes, and speaking on behalf of the Gelgamek Catholics, I believe we should move on to other solutions to this problem."

- Gelgamek Bishop

Gelgameks are an alien species from the planet of the same name. They had members amongst the Roman Catholic Church on their planet. They support sexual behavior with young boys, out of an apparent fear of their females.

Physiology
The Gelgameks are amphibians with green slimy skin and large eyes. The females of the species had large grotesque vaginas

Appearances
They are seen at the Vatican in "Red Hot Catholic Love".

Source

 * South Park Archives