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Latest Sexuality Stories

2011-05-21 00:01:22

The US Drug Watchdog is intensifying its initiative to inform all US women about potentially severe side effects such as severe gallbladder issues, blood clots, heart attacks, strokes, or other extremely serious medical issues associated with the use of the very popular birth control pills called Yaz, or Yasmin. The group is saying, "Millions of young women have used the Yaz, or Yasmin birth control pills, and we do not think they understand the potentially serious medical side effects. We...

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2010-11-25 08:32:37

You may think of your love for your mate as the noble emotion of a pure heart, but some primitive parts of your brain are taking a decidedly more pragmatic approach to the subject, according to Stanford biologists. In experiments with African cichlid fish, the scientists discovered that when a female shows a preference for a particular male, but then witnesses him losing a fight with another male, her feelings toward him change. Areas of the female's brain associated with anxiety showed...

2010-06-11 01:21:24

Sex "addiction" is a concept that has had particularly high visibility recently with the publicity associated with Tiger Woods. Persons with addictive or compulsive disorders frequently display an inability to inhibit behaviors once they become maladaptive, despite adverse consequences of their behavior. The medial prefrontal cortex (mPFC) is a brain region involved in decision-making and behavioral flexibility, and it has been identified as a potential mediator of behavioral inhibition. In a...

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2010-04-21 11:18:36

A new study by researchers in Germany, which appears in the Wednesday edition of the journal Biology Letters, provides new insight into the unusual sex life of spiders. Scientists Klaas W. Welke and Jutta M. Schneider of the University of Hamburg's Zoological Institute and Museum raised a handful of common European spiders from eggs that they discovered in a nearby meadow. The spiders were fed fruit flies until they reached adulthood, and Welke and Schneider observed their mating patterns....

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2010-01-14 11:54:56

A man's male hormones may ward off heart damage by helping vessels around the heart regenerate, suggest Australian researchers in a report posted January 13 in the Journal of Experimental Medicine. While studies have shown that estrogen helps blood vessels regenerate, both in the uterus after menstruation and around the heart after wear and tear, little is known about whether or not men make up for a lack of the female hormone. Some researchers have theorized that this disparity accounts for...

2009-11-17 14:04:13

Mountain goats are no exception to the general rule among mammals that larger males sire more and healthier offspring. But University of Alberta researcher David Coltman has found a genetic quirk that might make female mountain goats think twice about their romantic partners. Big, heavy males mountain goats shove lightweight Romeos aside taking the eligible females for themselves. The larger males pass their physical attributes and mating success to their male heirs. But Coltman's data shows...

2009-09-08 09:54:21

Females control sperm storage to pick the best father Scientists have found new evidence to explain how female insects can influence the father of their offspring, even after mating with up to ten males. A team from the University of Exeter has found that female crickets are able to control the amount of sperm that they store from each mate to select the best father for their young. The research team believes the females may be using their abdominal muscles to control the amount of sperm...

2009-04-25 08:20:19

A new study challenges long-standing expectations that men are promiscuous and women tend to be more particular when it comes to choosing a mate. The research, published by Cell Press in the April issue of the journal Trends in Ecology and Evolution, suggests that human mating strategies are not likely to conform to a single universal pattern and provides important insights that may impact future investigations of human mating behaviors. In 1948, Angus J. Bateman's performed some now famous...

2009-03-18 08:59:22

Female birds often choose their mates based on fancy feathers. Female mammals, on the other hand, may be more likely to follow their noses to the right mate. That's one conclusion of Cambridge zoologist Tim Clutton-Brock and Harvard researcher Katherine McAuliffe, whose review of evidence for female mate choice is published in the March 2009 issue of The Quarterly Review of Biology.Historically, most examples of female mate choice and its evolutionary consequences are found in birds. The...

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2009-01-02 07:56:50

UK researcher Corry Gellatly believes he has a new explanation for how the human race keeps a balance of males and females. The research scientist from Newcastle University proposes that a gene determines whether a man will father more sons or daughters.  According to Gellatly, when the female population is low, women have a better chance of finding a mate, which makes them more likely to pass the gene for fathering daughters to their children.  When men are scarce, they also have...


Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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