Human sexual activity
Sexual activity, sexual practice, sexual behaviour or, very broadly, sex is the set of activities people engage in that typically includes any combination of physical intimacy, physical contact with the reproductive organs (genitals) or erogenous zones, and erotic stimulation. Sexual acts range from activities done alone (e.g., masturbation) to acts with another person (e.g., sexual intercourse, non-penetrative sex, oral sex, etc.) or multiple persons (e.g., orgies) in varying patterns of frequency, for a wide variety of reasons.