These are dynamic socio-cultural categories used in everyday language that refer to certain behaviours and practices recognized within a culture as being “feminine” or “masculine,” regardless of which biological sex expresses them. These concepts are learned and do not describe sexual orientation or biological essence. They change with culture, religion, class, over time and with individuals and other factors. The values placed on femininities and masculinities vary with culture also. Any person may engage in forms of femininity and masculinity. As an example, a man can engage in what are often stereotyped as “feminine” activities, such as caring for a sick parent or staying home to raise children.