A person with whom someone has had sex.

plural of sexual partner

(evolutionary theory) A type of natural selection where members of the sexes acquire distinct forms either because the members of one sex choose mates with particular features or because in the competition for mates among the members of one sex only those with certain traits succeed.

A physical difference between male and female individuals of the same species.

plural of sexual orientation

Alternative form of nonsexual.

plural of sexual revolution

A period in which attitudes towards sexual behavior undergo a substantial change, usually in the direction of increased liberality.

plural of sexual intercourse

plural of sexual act