Basically says it by itself. Just come up with a random compliment (whether it be hypothetical or what) and post it here.
Here's an example:
*User 1 posts with an avy of Knuckles*
Knuckles could be an easy night guard, and that's why your avy owns big time.
*User 2 posts this comment with a Wii avatar*
The Wii is awesome, which means your avy is, too!
*User 3 posts this with another avy*
And it goes on from there.
Start with mine, and then do it to others.