Skip to content

    Health & Sex

    Font Size
    A
    A
    A

    Urine Smell May Have 'Manly' Attraction

    Chemical in Urine of Male Mice Signals Maleness, Attracts Female Mice
    By
    WebMD Health News

    Feb. 22, 2005 -- Is there such a thing as a uniquely male smell that attracts females? Yes, and it's not for sale at the cologne counter.

    In fact, it would probably be a dud in the scent industry. Not many men would want to wear it, especially since it would only beckon ladies of the rodent variety.

    The distinctive "male" smell was discovered in urine from male mice. It's produced by a chemical called MTMT (methylio) methanethiol. Female mice don't make MTMT. Neither do castrated male mice, which lack sex hormones. The compound converts easily into an odoriferous gas. Many compounds in the urine are used to signal reproduction and territorial recognition, say the researchers.

    A study of MTMT appears in the Feb. 20 advance online edition of the journal Nature. The report comes from researchers including Lawrence Katz, PhD, of Duke University Medical Center.

    The study was done on mice, which use odors as a form of social communication, as do many mammals. Obviously, humans behave differently, but smell still sways us in ways we don't always realize.

    "There are persistent reports about the influence of odorant communications in all sorts of behavior in humans -- mothers recognizing infants, wives recognizing husbands, and of course the influence of perfumes and colognes," says Katz, in a news release.

    Urine Smell: A Magnet for Female Mice

    "Female mice strongly prefer to smell male (as opposed to female) urine, and they largely ignore the urine from castrated males," write the researchers.

    Analyzing the urine showed that MTMT was the key ingredient. The researchers then gave female mice a choice of urine from castrated male mice or the same urine with a few drops of synthetic MTMT.

    The female mice were much more drawn to the MTMT-laced urine. All but two out of 18 female mice "spent significantly more time" smelling it compared with the plain urine, say the researchers.

    The female mice were also more interested in MTMT when it was presented in urine, not water. MTMT might indicate urine's freshness, say the researchers. "MTMT seems likely to advertise the presence of a male from a distance, either as a signal to other males or to attract females," they write.

    Today on WebMD

    couple not communicating
    How to tell when you're in one.
    couple face to face
    Get your love life back on track.
     
    couple having an argument
    Turn spats into solutions
    couple in argument
    When to call it quits.
     
    Life Cycle of a Penis
    Article
    HIV Myth Facts
    Slideshow
     
    How Healthy is Your Sex Life
    Quiz
    Couple in bed
    Video
     
    6 Tips For Teens
    Article
    Close-up of young man
    Article
     
    screening tests for men
    Slideshow
    HPV Vaccine Future
    Article