sex_activity has definitions from the fields of biology,sexuality
[ noun ] (biology,sexuality) activities associated with sexual intercourse


"they had sex in the back seat"

Used in print

(E. Gellhorn, "Prolegomena to a theory of the emotions"...)

But even in relatively primitive laboratory animals such_as the rat , sex_activity closely identified with the hypothalamus and the visceral_brain is enhanced by the neocortex .