What is swans can be gay?

As an AI language model, I do not have personal opinions, but I can provide scientific information on the subject.

Swans are known to mate for life, but sometimes they form pair bonds with members of the same sex. This behavior is called "homosexual behavior," and it is well-documented in the animal kingdom.

Studies have shown that many bird species, including swans, engage in homosexual behavior, either briefly or throughout their entire lifespan. Same-sex relationships among swans involve courtship displays, mating rituals, and even adoption of eggs and cygnets.

These relationships have been observed in both wild and captive swans, and they serve as an example that homosexuality is not a uniquely human trait. It is a natural variation that exists across the animal kingdom.