• Evolutionary meaning associated with exactly how sex as well as lovemaking alignment impact human being partner choice choices

    In an article published online April 4 in the journal Behaviour, Howard Russock of the Department of Biological and Environmental Sciences, Western Connecticut State University, compares mate preferences of men and women seeking same-sex versus opposite-sex mates, and compares these preferences to predictions from sexual lelo vibrators selection theory.

    Sexual selection and parental investment theory have been used to study mate selection for many years and for much of that time has been applied to humans, with the prediction that humans will follow the general mammalian pattern. One aspect of human mate selection that has received much less attention is that of same sex mate selection.

    Evolutionary meaning associated with exactly how sex as well as lovemaking alignment impact human being partner choice choices

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    Higher concentrations of the AIDS virus in genital secretions are linked to a greater risk of virus transmission between opposite-sex couples. The effect is independent of blood level of the virus.

    These findings will be reported in the April 7 edition of Science Translational Medicine, a publication of the American Association for the Advancement of Science.

    This is the first study to evaluate directly the relationship between genital concentrations of the HIV-1 virus and heterosexual transmission risk. The researchers demonstrated that high levels of HIV in mucus swabs from a woman's cervix (the opening to the womb) or in a man's semen predicted a high risk of HIV transmission to a partner of the opposite sex.

    Evolutionary meaning associated with exactly how sex as well as lovemaking alignment impact human being partner choice choices

    The results validate more than 20 years of research and dozens of studies measuring genital levels of HIV as potential measures of HIV infectiousness, said lead author Dr. Jared Baeten, assistant professor of global health and of medicine, Division of Allergy and Infectious Diseases, at the University of Washington in Seattle.

    The study results offer greater insight into the biology of HIV infection, Baeten said.

    Understanding the relationship between the reproduction of the virus in the genital tract and the risk of its transmission to others, the researchers explained, is central to understanding the biological mechanisms lover underlying the spread of the virus from one person to another during sexual activity.

    The researcher used a standard method of measuring HIV-1 levels in the specimens.

    This week's report also points to new strategies to make an HIV-1 positive person less infectious to their sexual partners. The results, Baeten added, suggest that HIV-1 levels in genital secretions might be used as a marker of a person's infectivity for research studies aiming to develop new HIV prevention technologies.

     

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