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  • Pucker up: Kissing is nature's litmus testadd to reading list  

    Posted on October 12, 2013 at 8:14 AM

    Updated Saturday, Oct 12 at 8:14 AM

    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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