by Anonymous on February 5th, 2005

Anonymous

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Why do males have nipples?

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  • by mister_c on February 7th, 2005

    mister_c

    After conception, the human embryo develops as a female. Only after 6-8 weeks does the Y chromosome kick in and the foetus begins developing male characteristics. By this point breast tissue, milk ducts and nipples have already formed. This happens in all mammals, by the way, the only exception being stallions who do not posses nipples.

    Generally evolution will only weed out a characteristic if it proves detrimental to the organism, and of course, although having nipples provides no benefit to a man it has no ill effect either. Darwin (and others) wondered if at some point in the very distant past the males of a species from which we are descended suckled their young. Unfortunately there is nothing in the fossil record to prove this, and besides there are no male mammals today who feed their young.

    http://www.bbc.co.uk/health/ask_doctor/nipples_men.shtml

    http://archive.salon.com/health/feature/1999/06/08/nipples/

    Comments
    • thanks

      Anonymous

      by Anonymous on March 6th, 2005

    • we were all girls to start with? That's cause for concern!

      Tuckstar

      by Tuckstar on March 23rd, 2005

    • Took my answer. And yes, truckstar, we all start out female and when male babies are born they have a higher level of estrogen and progesterine then testosterone because the fetus relies on the hormones in the mother's blood to function. And did you know that males must turn testosterone into estrogen in the brain for it to function? Some sumise that male is acctualy a mutation of the X chromosome.

      P. W. Pasobrio loves Marines

      by P. W. Pasobrio loves Marines on May 6th, 2007

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