Arianny Celeste, the Octagon Girl who yokes up UFC fans in their sweetest dreams, didn’t know anything about mixed martial arts when she took a job with the Ultimate Fighting Championship in 2006. The self-described fitness nerd proved to be a quick learner, though, and now she’s a grappling expert. Now, Celeste, 26, knows how to inflict damage if provoked. Thankfully, asking the Las Vegas native to get naked for a camera isn’t one such provocation.