But once again, the female albatrosses are not inherently homosexual. In both cases, the males are using homosexual behaviour as a roundabout way to fertilise more females. That is in line with a much-discussed study by the neuroscientist Simon LeVay.
To our eyes these encounters look startlingly intimate. But for most of that time, the documented cases were largely seen as anomalies or curiosities. It's not clear whether the same thing happens in wild sheep, and if LeVay's explanation is right it probably doesn't. They engage in an enormous amount of sex, so much so that it's often referred to as a "bonobo handshake", and that includes homosexual behaviour among both males and females.
One female will mount another, then stimulate her genitals by rubbing them against the other female. They often mount each other, and go so far as depositing sperm. So LeVay and Vasey still say that humans are the only documented case of "true" homosexuality in wild animals.
In relation to humans Applying the term homosexual to animals The term homosexual was coined by Karl-Maria Kertbeny in to describe same-sex sexual attraction and sexual behavior in humans. Males that have had a fight sometimes perform genital-to-genital touching, known as "penis fencing", as a way of reducing tension. After a while, they learn to recognise the smell of virgin females, and focus on them.
Junior bonobos may use sex to bond with more dominant group members, allowing them to climb the social ladder. Texas , which ultimately struck down the sodomy laws of 14 states.
How could this preference for other males be passed on to offspring? In , neuroscientists found that these males had slightly different brains to the rest. But while hundreds of species have been documented doing it on isolated occasions, only a handful have made it a habitual part of their lives, says Vasey. They don't show a consistent sexual orientation.
Posted by: Nebei | on October 2, 2012
View image of Laysan albatrosses normally mate for life Credit: An example of overlooking homosexual behavior is noted by Bagemihl describing mating giraffes where nine out of ten pairings occur between males: This all-female species has evolved from lizards with two sexes, but their eggs develop without fertilization parthenogenesis.
Scientific writing would benefit from reserving this anthropomorphic term for humans and not using it to describe behavior in other animals, because of its deeply rooted context in human society". So what's really going on? What's more, they rear chicks, fathered by males that are already in a committed pair but which sneak matings with one or both of the females.
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They don't show a consistent sexual orientation Just like humans can use sex to gain all sorts of advantages, so can animals. They engage in an enormous amount of sex, so much so that it's often referred to as a "bonobo handshake", and that includes homosexual behaviour among both males and females.
On the face of it, homosexual behaviour by animals looks like a really bad idea Despite Bagemihl's roster of examples, homosexual behaviour still seems to be a rarity. In other words, the female Laysan albatrosses probably wouldn't choose to pair with other females if there were enough males to go round.