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Latest Sexuality Stories

2012-08-16 13:11:58

Sexual selection in the Forked Fungus Beetle favors larger body and horn size, and a new study investigates the relationship between these traits and the beetles' grip strength, which is crucial for the male to hold on to the female and shield her from other males in an elaborate courtship ritual. The full results are reported on Aug. 15 in the open access journal PLoS ONE. During the courtship ritual, male beetles grab onto the female, sometime for several hours, which would seem to favor...

Mating Plugs Produced By Female Spiders To Prevent Unwanted Sex From Males
2012-08-05 10:30:36

redOrbit Staff & Wire Reports - Your Universe Online A new mechanism of animal mating plug production has been discovered by scientists at the Smithsonian and their colleagues. In the giant wood spider (Nephila pilipes), which is a highly sexually dimorphic and polygamous species, many small males will compete with each other for their chance with a few large females. These males have been known to sever their own genitals during mating in order to plug the female, gain paternity and...

Monogamy Evolved From Chest-Thumping To Caregiving
2012-05-29 12:14:10

John Neumann for RedOrbit.com Chest-thumping and grunting alpha males, a study suggests, may be losing the battle for preferable females to males who can demonstrate caregiving and the ability to provide for a family, according to research published in the Proceedings of the National Academy of Sciences. The research team says they have demonstrated mathematically that the transition to pair-bonding was based on female choice and faithfulness, so that providing for females became a...

2012-05-03 18:49:35

At one University of Cincinnati laboratory, the phrase “battle of the sexes” is taking on new meaning, with implications for our understanding of evolution. In a paper published Thursday, May 3, in the journal Evolution, University of Cincinnati graduate student Karl Grieshop and Michal Polak, associate professor of biological sciences at UC, examine the role of genital spines in the reproductive success of a species of fruit fly. Their investigation identifies the specific...

Discerning Males Remain Faithful
2012-04-25 04:50:54

Discerning males remain faithful...if you are a spider. Sex for male orb web spiders (Argiope bruennichi) is a two shot affair since the act of mating destroys their genitalia. If they survive being eaten during their first encounter with a female, they have two choices — to mate again with the same female (monogynous) or try to find a new partner (bigynous). New research published in BioMed Central's open access journal Frontiers in Zoology shows that choice of mating behavior for A....

2012-03-21 13:52:29

Males consistently change their mating behavior depending on whether they have spent time with other males before mating, according to new findings by scientists at the University of East Anglia (UEA). Publishing today in the journal Proceedings of the Royal Society B, the researchers studied how male Drosophila melanogaster - or fruit flies - change their mating behavior in response to their social environment. Previously, the UEA team had found that in a single mating, males exposed...

Male Spiders Eavesdrop To One-Up Their Rivals
2012-01-04 11:18:01

[ Watch the Video ] Just published this month, new research shows how spiders eavesdrop on other males and copy their courtship signals as a likely means of stealing their mate. Researchers have made a new discovery into the complex world of spiders that reflects what some might perceive as similar behavior in human society. As male wolf spiders go searching for a mate, it appears they eavesdrop, match and even try to outdo the mating dances of their successful rivals, a behavior seen...

Do Men Really Think About Sex All Day Long?
2011-11-29 04:30:48

Men may think about sex more often than women do, but a new study suggests that men also think about other biological needs, such as eating and sleep, more frequently than women do, as well. And the research discredits the persistent stereotype that men think about sex every seven seconds, which would amount to more than 8,000 thoughts about sex in 16 waking hours. In the study, the median number of young men´s thought about sex stood at almost 19 times per day. Young women in the...

Female Mate Searching Evolves When Mating Gifts Are Important
2011-09-28 12:34:39

In the animal world, males typically search for their female partners. The mystery is that in some species, you get a reversal -- the females search for males. A new study of katydids in the latest issue of the journal Proceedings of the Royal Society B -- co-authored by University of Toronto Mississauga professor Darryl Gwynne -- supports a theory that females will search if males offer a lot more than just sperm. "In this beast [in this study], it's a big cheesy, gooey substance that...

2011-06-29 06:59:46

(Ivanhoe Newswire) "“ The U.S. FDA notes "some concern" with the chemical BPA and some countries have considered BPA product bans. Still, scientists disagree about the effects of BPA on animals and humans. This study shows BPA to cause male deer mice to become demasculinized and behave more like females in their spatial navigational abilities, leading scientists to believe that exposure to BPA during human development could be damaging to behavioral and cognitive traits that are unique...


Word of the Day
malpais
  • The ragged surface of a lava-flow.
'Malpais' translates from Spanish as 'bad land.'