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Matilda Brindle /The Conversation If I asked you to imagine your dream snog, chances are it wouldn’t be with a Neanderthal; burly and hirsute as they may be. However, my team’s new research suggests that these squat beefcakes might have been right up your ancestors’ street. In our new paper, published in Evolution and Human Behavior, my colleagues and I investigated kissing in monkeys and apes, including modern humans and Neanderthals, to reconstruct its evolutionary history for the first time. All Kisses Are Not Equal Before we could do this, we needed to construct a definition of kissing that was applicable across a wide variety of animals. This sounds simple, but lots of behavior looks like kissing at first glance