Kissing evolved to help humans choose mates, study says

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Kissing evolved to help humans choose mates, study says

by CBSTV Videos 2:10 mins

Kissing evolved to help humans choose mates, study says

by CBSTV Videos 2:10 mins

Sheril Kirshenbaum, a research scientist at the University of Texas at Austin, and author of "The Science of Kissing," talks to the "CBS This Morning" co-hosts about how kissing may be an indicator of long-term compatibility potential with a partner.

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