Dude, furrydom is a sexual fetish.

Anthropomorphic animals are an artform.

I think we forget about that because there is an absolute G-rated aspect to the artform but the furries and cons are essentially adults looking to have a fetish convention. I'm not really sure why you're surprised by the idea that fetishes cross into other weird territory.

That being said, AC is pretty much a chill low-key event that's more G/PG rated stuff but I've had enough friends get into orgies to know what's going on in those 7600 rooms.