Add Yahoo as a preferred source to see more of our stories on Google. One kiss is all it takes: Lopez with her female backing dancer at the AMAs - Getty One kiss was all it took to put Jennifer Lopez ...
In the words of Dua Lipa, one kiss is all it took about 21 million years ago. That's roughly when scientists estimate that kissing first emerged in the common ancestor of humans and other great apes.
A single kiss can leave a lasting impression, whether it's in real life or on the silver screen. But why, exactly?
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