"Since the term “sex” refers to biological or physical distinctions, characteristics of sex will not vary significantly between different human societies. For example, persons of the female sex, in general, regardless of culture, will eventually menstruate and develop breasts that can lactate. Characteristics of gender, on the other hand, may vary greatly between different societies. For example, in American culture, it is considered feminine, or a trait of the female gender, to wear a dress or skirt. However, in many Middle Eastern, Asian, and African cultures, dresses or skirts, often referred to as sarongs, robes, or gowns, can be considered masculine. Similarly, the kilt worn by a Scottish male does not make him appear feminine in his culture."