One's desire to engage in sexual practices.

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.

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

plural of sexual orientation

plural of sexual revolution

(psychology) A psychological complex involving fixations of a sexual nature; a fetish.

Sexual orientation.

Coitus or genital-genital sexual contact. / Sexual interaction, usually involving vaginal and/or anal and/or oral penetration, between at least two organisms.