We're now beginning to get a more complete picture of why Twilight star Kristen Stewart seemed a little glassy-eyed and distracted on a recent Late Show with David Letterman appearance, responding to the increasingly annoyed host's questions about the film with non sequiturs like, "You know what would be so choice right now? S'mores!"Surely there's no harm in combating the pressures of carrying a newly hatched franchise on your shoulders by indulging every now and again in a little medicinal vampirenip (available at a nearby WeHo dispensary in a tightly-packed baggie labeled "Transylvanian Power Skunk"). Our only concern is where all this might eventually lead, as studies have proven time and again that vampires are a notorious gateway-monster. We'd hate to see the talented young actress bent over a glass coffee table a few months from now, chattering on about the wonders of Bumble and Bumble hair conditioner at a 4 a.m. werewolf-blow party.