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3. Why do we kiss?
Why Do We Do That?
Kissing Is a Better Indicator of Relationship Quality Than Frequency of Sex
Kissing helps you select a potential mating partner before making a commitment. The most important part of a kiss that seems to have come up with research is the smell of a kiss. So what we're saying is on an unconscious level, kissing is partly about smelling the person to work out if you're genetically compatible with it. And that's why some people might smell awful to you and they might smell actually pretty good to someone else.
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