No argument here but I feel like you used penguins as an example knowing full well someone would respond with "oh yeah well penguins are well documented to exhibit homosexual behaviors!!"

I mean of all possible mammals to choose as an example for your point (presuming in good faith that your actual point was as stated), penguin is an unusual choice. Maybe you just happened to have penguins in mind as an example of a mammal, I don't know.

Oh, and by the way: penguins aren't mammals! Though I'm sure someone has already pointed that out, or at least I hope they did.