Of or pertaining to sex, or the sexes; distinguishing sex; peculiar to the distinction and office of male or female; relating to the distinctive genital organs of the sexes; proceeding from, or based upon, sex; as, sexual characteristics; sexual intercourse, connection, or commerce; sexual desire; sexual diseases; sexual generation.

of or relating to or characterized by sexuality; "sexual orientation"; "sexual distinctions"

involved in a sexual relationship; "the intimate (or sexual) relations between husband and wife"; "she had been intimate with many men"

Related to sex or love-making e.g. kissing; touching breasts or genitals with hands or mouth; penetration etc.

Adjective; pertaining to sex.