It is a thread where people whom enjoy quality images of anthropomorphic (or non-anthropomorphic) animals or mythical creatures and share images that they like so that others may comment or fawn over
It's like the hot anime girls thread, except with furry/scaley/slimey anthropomorphic creatures
A lot of it is gay or suggestive male images because that's what the majority of people who post there are into, and people who don't like those kinds of images refuse to post their own and just complain about seeing crotch bulges