I always got the impression that if you circumcised one of these guys, you're in for some horrific slavering Lovecraftian maw filled with caustic saliva that burns your face off right before they bite your head off in one bite.
Back when I lived in Seattle, the PBS HD station was just getting started up. Boobah is one of the few pieces of HD content they had. They showed it at 3 AM. It was amaaaaaaazing.
I'm not sure what's worse. The fact that they have articulated eyes that move, or the possibility that they could've gone with unblinking, unmoving glassy doll eyes.