Namely, gay men are shifted towards the feminine: "what's striking is the large number of traits in which gay people's minds are at least part-way shifted in gender-atypical direction" according to Simon Le Vay, a neuroscientist whose own research on sexual orientation is often invoked by the "born that way" side.
But as World No.1 Serena Williams landed at Perth airport on Saturday, all that appeared to occupy her mind was the angle that showed off her best side as she posed for snaps with beau Patrick Mouratoglou.
It's the controversial new segment which saw last week's couple strip nude, make out and have sex all within hours of meeting.
All of the inmates who are listed here enjoy getting letters; especially those letters which help build their confidence.
It can be a lot of fun communicating with these male and female inmates." "It's no fun looking for love when you're a clown, behind all the make-up and the red nose is a lonely heart.
The prevailing theory is simple: "Differences in levels of circulating sex hormones [of the fetus] usually testosterone during one or more critical periods of development cause the brain to develop in a more-male-like or more female-like direction, and these differences influence a spectrum of gendered traits in juvenile life and adulthood, including the preference for male and female sex partners." More simply, prenatal hormones circulating in the mother's womb influence the sexual orientation of the fetus.