ENT: Cogenitor

An episode that looks at non-interference and tolerance for other's mating practices. The Enterprise is studying a super-gas giant planet, and discover a more advanced race is doing the same. They find themselves sharing technology, information, and culture...until Trip discovers that he cannot sanction their mating practices. The Vissians are tri gendered, but the third gender is treated like an animal. When Trip interferes, the repercussions are harsh.