Durham, NC — Many plants can pollinate themselves and reproduce without the aid of a mate, thanks to having both male and female parts. But the short-term perks of being able to go it alone come with long-term costs, says a new study in the journa…
People love to speculate about differences between the sexes, and neuroscience has brought a new technology to this pastime. Brain imaging studies are published at a great rate, and some report sex differences in brain structure or patterns of neura…
New research from North Carolina State University will help medical examiners and others identify human remains of those killed during the recent earthquake in Chile, as well as the bodies of the “disappeared” who were killed during the Pinochet…
The prevalence of sex in the mainstream media has led many researchers to study its effect on impressionable adolescents. Several published, peer-reviewed studies have indicated that there is a link between exposure to sex in the media and the early…
Satisfactory sexual intercourse for couples lasts from 3 to 13 minutes, contrary to popular fantasy about the need for hours of sexual activity, according to a survey of U.S. and Canadian sex therapists.
New research by Israeli fertility experts has challenged current medical opinion, which holds that refraining from sex for up to a week at least is beneficial for men prior to undergoing some types of fertility treatment. Doctors and scientists from Soroka University and Ben-Gurion University of the Negev, Beer-Sheva, tested over 7,200 semen samples for semen volume, sperm concentration and shape, and the percentage and total count of motile (active and moving) sperm. The samples were from around 6,000 men being investigated or treated for infertility who had abstained from sex for periods up to two weeks.
Men are from Mars and women are from Venus, or so we’ve been told, and when it comes to jealousy this is especially true. Men, psychologists have long contended, tend to care more about sexual infidelity while women usually react more strongly to emotional infidelity. This view has long been espoused by evolutionary psychologists who attribute these gender differences to natural selection, which, they say, encouraged the sexes to develop different emotional reactions to jealousy. However, a recent research paper published in Personality and Social Psychology Review by Christine Harris, a psychologist with the Center for Brain and Cognition at the University of California, San Diego, casts serious doubts on this view of gender differences on jealousy and argues that more men and women appear to view sexual and emotional jealousy in the same light.
Inmates infected with HIV, the virus that causes AIDS, engaged in unprotected sex both before imprisonment and after their release at “exceedingly high rates,” according to a new University of North Carolina at Chapel Hill School of Medicine study. Seventy-eight percent of N.C. men and women prisoners carrying the virus who had a main sex partner reported unprotected sex with that person in the year before they were locked up, the study showed. Twenty-six percent of them interviewed again soon after release admitted to already having sex without condoms with their main sex partners.