Mating

Mating was a term for breeding, often used in reference to animals. A species of bird native to Erindra, called Gadots, were famous for their complex mating rituals. (AUDIO: Waiting for Gadot)

Mishearing the Tenth Doctor, Donna Noble initially believed that he wanted "to mate" and quipped "you're not mating with me, sunshine", forcing the Doctor to reiterate to the disgusted Donna that he wanted "a mate". (TV: Partners in Crime)