Donkey punch is slang term for an apocryphal and potentially lethal sexual practice supposedly performed during anal or vaginal sex. The purported practice involves the penetrating partner punching the receiving partner in the back of the head or neck (what is known in boxing as a rabbit punch, after a technique to kill rabbits). The alleged goal is to cause the receiving partner's anal passage to tense up, thereby increasing the pleasure of the penetrating partner; however, there is no medical evidence that it works, or, for that matter, any reason that it would. When used, the donkey punch is almost exclusively executed during or just before the orgasm of the penetrating partner (see orgasm control).