This is something I've started paying attention to more over the last few months. I've always had a passion for the natural sciences and am currently a college student in a science major. Heterosexuality is always discussed nonstop in life science classes for things like reproduction, genetics, evolution, mating behavior, the family structure of animals etc. but I've recently realized that homosexuality is never mentioned at all, like ever, in my entire life not one teacher/professor has at any point mentioned any aspect of homosexuality in a science class. It's not that they're against it, they simply don't acknowledge it exists at all. I started looking through zoology research studies and managed to find some things myself. For example interestingly when male swans are given the choice between a male or a female to mate with, they choose to mate with the other male about 25% of the time. They even sometimes form lifelong couplings with other males, and will literally steal eggs and nests from female swans to raise newborn chicks themselves as a same-sex couple. It also appears that the majority of male dolphins have mated with other males, and sometimes form polyamorous groups of 5+ young males that all show affection for and mate with each other as a group. Most scientists seem to be either Atheist/Agnostic or not very religious so I'm not sure the total lack of discussion about homosexuality in science is linked to that. There's clearly an abundance of research on it, it's a pretty significant part of society, and is one of the main political/religious discussions of modern times... so why does the scientific community refuse to talk about it at all and instead chooses to sweep it under the rug and pretend it doesn't exist?