I'm usually content to live and let live with realism levels, given that it IS a game and sometimes the results are pretty cool-looking, but there was this one time when I came upon a white tiger with a black mane. He started impromptu RPing (which was cool, since I was bored and in the middle of nowhere in Fluorite), and kept addressing my character (a realistic male Saharan cheetah) as 'she.' When I corrected him, he seemed almost offended and told me that I should have a mane, because all male characters 'have to have manes.' No matter how I tried to explain that the character was supposed to be realistic and cheetahs don't have manes, or that I just don't like putting hair or manes on creatures that don't normally have them, it didn't seem to get through to him; he was just really convinced that if you were a dude you HAD to have a mane. It was a very odd conversation and I eventually just gave up and walked away.