You've known for a long time that Joe Manganiello is incredibly hot — so hot, in fact, that it can often be hard to look at him. From his shirtless [1] scenes in True Blood to his, um, more than shirtless [2] scenes in Magic Mike, it goes without saying that Joe's physique is a true work of art [3]. We've already rounded up his best photos sans shirt [4], but now we're highlighting one of his most impressive features: those enormous, bulging biceps. Get a big, cold glass of water and scroll through for 15 photos of Joe Manganiello's arms — then be sure to check out the best shirtless photos of Joe and his Magic Mike costars [5].