The Discovery Channel has suggested that most of us are drawn to the opposite sex who got a strong dose of sex hormones during puberty.
Why is this? A very masculine face in a man suggests high levels of testosterone and a woman’s face that is feminine suggests that she has high levels of estrogen and progesterone signaling a healthy reproductive system. This indicates good health and fertility.
Check out the video below, which delineates the process sex hormones have on individuals: