In Bar Refaeli's latest video ad for her underwear line, Under.Me, she dives into a pool wearing a curious mix of garments: a long-sleeved E-shirt, a thong, and a pair of thick-framed eyeglasses. Anyone who's ever gone swimming in a cotton thong (or, ahem, been thrown in the water while wearing one) knows that it's not a pleasant experience and hardly something one should do voluntarily. How those glasses stay on underwater is another mystery entirely.