Sexual activity, usually sexual intercourse unless preceded by a modifier.
A category into which sexually-reproducing organisms are divided on the basis of their reproductive roles in their species.
Genitalia: a penis or vagina.
Another category, especially of humans and especially based on sexuality or gender roles.
The distinction and relation between these categories, especially in humans; gender.
The members of such a category, taken collectively.
To determine the sex of (an animal).
To have sex with.
To have sex.
Coitus or genital-genital sexual contact.
Sexual interaction, usually involving vaginal and/or anal and/or oral penetration, between at least two organisms.