I must admit I never heard the word mooning before.
*browses dictionary and FA's search*
To show somebody your butt? Oh, I see. It's like how people who are into paws but just a different body part. =o

Oh, hey you.
Yes, like how people like paws, but with a different body part.

Hmm...I'm not sure how many Furs really come with an actual pair of hindquarters unless it's extra drawn in for anthro style characters. In the example of Shiny I'd say his Totobutt mostly is just his lil stubby tail without actual cheeks. <X3

I know some furs who have cheeks on their rears... you did make a valid point about furs not having hindquarters, though.