Compared to straight men, gay men are more likely to be left-handed, to be the younger siblings of older brothers, and to have hair that whorls in a counterclockwise direction.

• 较之异性恋男人，同性恋男人更可能呈现这样一些特征：左撇子，有多个兄长，头顶有逆时针方向的发旋。