A new study (the largest study done to date) found that children of same-sex families grow to be physically healthier, and their families more cohesive.
In general, you have about a five percent chance of being born gay. But if you’re one half of a pair of fraternal twins (sharing the womb but only half your DNA — the same amount as any other biological sibling), you’ve got about a 25 percent chance of being faaaabulous!
The science behind sexual orientation began in part with a 1991 study by Dr. Simon LeVay, then a neurobiologist at the Salk Institute for Biological Studies in La Jolla, California. LeVay measured the size of a group of cells called the nucleus within the anterior hypothalamus, a region of the brain previously linked to the regulation of sexual behavior in other animals.