This is a little like saying &quot;why do so many animals fall in love&quot;? Homosexuality, like love, is a human abstraction and doesn&#x27;t really apply to the broader animal kingdom. Animals are acting more on instinct than we are, and when they pair up it&#x27;s due to a survivalist instinct rather than a complicated social construct. So the answer is, there are no &quot;gay&quot; animals just like animals don&#x27;t &quot;fall in love&quot;. We are simply projecting our highly abstract concepts onto them.