Homosexuality: no established cause

Throughout the consultations, evidence is required. "Many people would prefer to be straight," it would be easier "to their statements". Comments that lead him to question some assumptions. "This sexual orientation is not chosen. What seems obvious to heterosexuals, is also for homosexuals."

Then there are the determining factors? Traditionally, and according to psychoanalytic theory, too much attachment to the mother and the father's absence could be a determining factor. Apart from that Mireille Bonierbale, president of the postgraduate interdisciplinary Association of Sexology, said that if "38% of homosexuals belong to such a family, 32% of heterosexuals, too."

From the perspective of neuroscience, noticed the work, but criticism of Simon le Vay, specializing in sexual orientation. In 1994, it shows a morphological difference in the nucleus of the preoptic area in "25 homosexuals" and transsexuals. "One line of research that should be confirmed," commented Philippe Brenot. Other factors come into play as the hormone level, and biological, but today nothing decisive has been established.