Do you enjoy Burt's Bees lip balm, but wish the weird tingly effect was even more pronounced? Now there's Morphine Lip Balm, which contains 4% benzocaine, the numbing ingredient found in Orajel and mosquito bit sprays. The original prototype used 20% lidocaine, but that "numbed your whole face." Apparently finding the right balance of sexy numbness is a delicate balance.