Homosexual thoughts 'are an essential part of evolution'

A new study has concluded that homosexual thoughts are an important part of human evolution. The study, carried out at the University of Portsmouth, said that homoerotic thoughts have a "societal benefit" and help us bond with people of the same sex, a behaviour which can be traced back to some of the earliest human beings. o-GAY-KISSING-facebook Homosexual thoughts are also more likely in men and women who have higher levels of the hormone progesterone. The hormone is associated with affiliation, and therefore important in the development of same-sex friendships. Dr Diana Fleischman, author of the study report, said that she wanted to investigate why homosexuality "persists", despite having no link to the reproduction and evolution. She said: "From an evolutionary perspective we tend to think of sexual behaviour as a means to an end for reproduction. However, because sexual behaviour is intimate and pleasurable, it is also used in many species, including non-human primates, to help form and maintain social bonds. "We can all see this in romantic couples who bond by engaging in sexual behaviour even when reproduction is not possible. Having some degree of attraction to the opposite sex is a type of adaptive behaviour, and in any adaptive behaviour you will see extremes of the spectrum, hence some people will only be attracted to members of the same sex. "But the research suggests that having exclusively heterosexual thoughts is a disadvantage – it’s better to be a little bit attracted to the opposite sex," she added. As part of the study, participants were asked to answer questions on their feelings about kissing members of the same-sex, and this was then compared to the levels of progesterone in their saliva. Professor Gerard Conway, from University College London, has questioned the link made to progesterone, but said that the "societal benefit" of homosexuality is "plausible". Dr Fleischman’s study has been published in the journal Archives of Sexual Behaviour. More Stories: > Study: 93% of straight men have ‘cuddled with another guy’ > Study: lifting US gay blood ban could save 1.8 million lives