Why does gay exist

A few scientists think so. Scientists may have finally solved the puzzle of what makes a person gay, and how it is passed from parents to their children. Why are there homosexuals? At first glance, it’s a silly, even offensive question—some people are gay, and you’ll just have to deal with it. But for biologists, it’s a real puzzle. How, after all, could evolution create people genetically predisposed not to breed (at least, not without third-party assistance)?.

The review-paper authors do rule out one explanation for homosexuality, however: That tolerance for gay people encourages more people to become gay. Homosexuality is romantic attraction, sexual attraction, or sexual behavior between people of the same sex or gender. [1][2][3] As a sexual orientation, homosexuality is "an enduring pattern of emotional, romantic, and/or sexual attractions" exclusively to people of the same sex or gender.

[4][failed verification] It also denotes identity based on attraction, related behavior, and community. But as for why genetic factors would exist that make men gay, it appears that these genes make women, as well as gay men, alluring to other men. Follow Natalie Wolchover on Twitter @ nattyover. Macklemore and Ryan Lewis's hit song Same Love, which has become an unofficial anthem of the pro-gay marriage campaign in the US, reflects how many gay people feel about their sexuality.

Log In My Account. The predominant focus of this paper is male homosexuality, because substantially more scientific data has been published on same-sex sexual orientation in males compared to females. Kirkpatrick They are a transgender group who do not like to be called "gay" or "homosexual". In Western countries today, the prevalence of male homosexuality is between two and eight percent.

During their pregnancies, the mothers of gay men suffered severe stress significantly more often than the mothers of heterosexual men Figure 2. Events More events. In our closest primate relative , the bonobo, straight and gay sex have vital roles in play, social transactions, barter of food, same-sex social bonding and bonding between mating pairs. Furthermore, male homosexuality could help reduce counterproductive competition among male siblings and cousins for female mates.

We conclude from this study that same-sex sexual behaviour in both males and females evolved as species shifted from solitary living to sociality. The emerging understanding of the biology of sexual orientation indicates that same-sex sexual preference is a naturally intended, normal variant that evolved via kin selection, and thus it should not be considered illegal or emotionally depraved.

Nevertheless, same-sex physical intimacy is illegal in many nations, with punishments including death or imprisonment. Still, enough of the pieces of the puzzle of homosexuality are now visible to begin to see a pattern. Attraction, sexual behaviour, social bonds and desire all contribute to its complexity. But how does it fit with Darwin's theory of evolution? Rice believes that female foetuses employ an epimark that makes them less sensitive to testosterone.

However, several large studies scanning the entire human genome have not revealed a single, consistent genetic variant among males with homosexuality. Using a tree of relationships of mammals to each other — confirmed with DNA sequence comparisons — the patterns of same-sex sexual behaviour were mapped onto the relationships between species.

Research on the causes of homosexuality suggests that

We believe this led to the evolution of a whole range of traits including reduced aggression, increased communication, understanding, social play and affiliation. No special explanation is necessary. Link copied. Vasey believes that his Samoan result was different because the men he studied there were different. Ngun and Vilain created an algorithm based on the pattern of epi-marks that could correctly predict the sexual orientation of seventy percent of the individuals in the study.

In a paper published yesterday by myself and Duke University professor Brian Hare, we propose human sexuality including homosexuality evolved as an outcome of the evolution of increased sociability in humans. Also relevant - although in no way proof - is research identifying physical differences in the brains of adult straight and gay people, and a dizzying array of homosexual behaviour in animals. Bobrow, D. By improving the functionality of the group, gay males could help their siblings reproduce more successfully and improve the viability of their nieces and nephews in harsh ancestral environments.

Because females have two X-chromosomes, one of the X-chromosomes is deactivated in each cell early in embryonic development, usually in a random fashion whereby the maternal X is inactivated in about fifty percent of the cells, and the paternal X is inactivated in the other fifty percent.