Sexuality

Sexuality is the physiological or emotional drive responsible for physical attachments stemming either from a biological or societal need to bond with a mate. This adaptation primarily facilitates sexual reproduction, however, even those attracted that cannot or do not reproduce still have a deep-seated need for the kind of satisfaction a mate provides. In many cases, the ties contribute to causing permanent or long-lasting sexual relationships, which may be monogamous or polygamous.

This drive can also lead individuals to enter a relationship or mate for reasons of satisfaction or emotional fulfillment rather than procreation. Individuals of many species have also been known to enter into homosexual relationships.

Still not funny, but you know, uh, true.