How the hell did a show about high school theater geeks come to be the biggest TV show in America? Well, T&A helps. (That’s talent and ambition, you pervs.) But so does a generous helping of pot-laced brownies, girl-on-girl subtext, and choreographed dry-humping. Gleeksters Lea Michele, Dianna Agron, and Cory Monteith pull Alex Pappademas into the vortex.