For 10 points, name this action commonly appearing in songs like the aforementioned "Back Door Man" as well as Samwell's "What What (In the Butt)".
One song about this act features the lyrics "now when you take me by the hooves who's ever gonna know?".  In addition to Toni Basil's "Mickey", another song about this action has the singer saying "If you knock me down I'll come back running", and one other song has its singer implore "baby, please don't refuse".  In addition to Tool's "4 Degrees" and Kiss's debut single "Nothin' to Lose", a Willie Dixon song written for Howlin' Wolf was not about this action, but the Doors' cover version was, according to Jim Morrison. For 10 points, name this action commonly appearing in songs like the aforementioned "Back Door Man" as well as Samwell's "What What (In the Butt)".
One song about this act features the lyrics "now when you take me by the hooves who's ever gonna know?".  
{anal sex} (accept equivalents)