English Art/Literary Cinema, Film, TV, Drama

Sorry to ask, it's just that I'm reading some critical and very sarcastic articles about "Lost" TV show, and the author calls Boone `Pen Wrangler', and I can't really understand the joke. The context is (the 1st Episode 1st Season): "Night on the beach. Time to meet the castaways! Charlie is writing "FATE" on his fingers, and some girl is painting her toenails. I'm glad everyone is making an effort to keep their digits looking good. I have to watch this show, after all, and there's nothing worse than watching a show filled with people with boring, unadorned fingers and toes. Toenails's companion, the Pen Wrangler, comes over and offers her some chocolate, which she rejects out of hand. Many folks on the boards have talked about how this scene proves she's a bitch. And I'm not disagreeing that she's a bitch, but I also like to imagine that she rejects the chocolate because she's actually deathly afraid of chocolate and cannot get near it, even if there's no other way to stay alive. She's not a chocoholic; she's a chocophobe. Pen Wrangler tells her that they may be stuck on the island for a while; she tells him that help is on its way, and that she'll eat on the rescue boat".

Anyone to explain the meaning of `Pen Wrangler'? Thank you in advance... mates :)