The husband and wife team maintained that since at least the late third millennium B.C., kissing was a well-established and widespread part of romance in the Middle East.
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Danish historians say evidence of the first mouth-to-mouth smooch can be found on a clay tablet unearthed in the Middle East, upending academic theory about which culture kissed first. Until recently, scholars believed that those in South Asian were the first to engage in lusty lip-locking, with the practice spreading around the globe circa 300 B.C. the same time the Indian sex manual, the Kama Stura, was first published. But in a recent article for Science, Dr. Troels Pank Arbøll, left, and Dr. Sophie Lund Rasmussen assert that humans were twisting their tongues together much earlier than that.