The Unromantic Truth About Why We Kiss — To Spread Germs

Fiona Macrae writes in the Daily Mail:

It is an international symbol of love and romance. But the kiss may have evolved for reasons that are far more practical — and less alluring. British scientists believe it developed to spread germs.

They say that the uniquely human habit allows a bug that is dangerous in pregnancy to be passed from man to woman to give her time to build up immunity. Cytomegalovirus, which lurks in saliva, normally causes no problems. But it can be extremely dangerous if caught while pregnant and can kill unborn babies or cause birth defects. These can include problems ranging from deafness to cerebral palsy.

Writing in the journal Medical Hypotheses, researcher Dr Colin Hendrie from the University of Leeds said: ‘Female inoculation with a specific male’s cytomegalovirus is most efficiently achieved through mouth-to-mouth contact and saliva exchange.

Image via Wikimedia Commons

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  • tony neilsen

    who is paying these imbeciles to come up with this garbage???

  • Sean

    how does a belief equal a truth in science?

  • tres

    My genes aren't meant to propagate because I love kissing most after gurgling with Listerine.

  • tonyviner

    I kiss my mom while she sleeps.

    • psychognosis

      I do it while shes awake.

  • Anonymous

    I do it while shes awake.