The guy is really not against the skull hand, per se, it can serve the same general gripping purpose, and it's not his ... ahem ... right hand (sorry lefties), and "Hey, check out my skull hand" is a great ice-breaker at the bar.
No, this skeleton isn't satisfied with just attaching himself to this man, he's going to crank up the jerkiness by actually being a Christmas skeleton. Nothing else says nerve-shattering terror than twinkling red and green lights. By the way, that's not skull spit in between his teeth, it's tinsel.
Skull spit. Hm. Good punk band name!