Why we do not see gay couples in the animal environment?

Animals don't have a preferred , they go on instinct, their instincts are telling them to reproduce, their instincts tell them they need to mate with a female to reproduce, however, there are animals that do commit acts. I personally have had dogs, among other animals, where two males would go at it. But that's usually a dominance act. Animals, most, anyways, don't have for enjoyment, it's purely to reproduce, and nothing more. They need females to reproduce.