Facebook friend recommendations of strangers by mutual friends count:
1: friend of that guy who befriends a lot of pretty girls
2-5: 2nd-order association of my gang; doesn’t hang out at the cafe when I do
6-12: goes to Burning Man/Burning Flipside
13-18: really popular at Burning Man and is an artist or performer or something
19+: there’s a damn good reason why I’m not a friend of this person