The definition of "have sex" must be unique. Re: Mehta CM, et al: "sex isn't something you do with someone you don't care about": young women's definitions of sex. J Pediatr Adolesc Gynecol. 2011; 24:266-71.
Vincenzo
V
Puppo
D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D012725:Sexual Behavior / Q000523:psychology*