When used in a literal sense, the phrase can act as dirty talk and be arousing, but it also ensures that the receiving partner is adequately prepared for rear entry sexual activity. This most commonly involves anal sex, but may also include rear-entry vaginal sex, rimming, or digital penetration. For this reason, the phrase may also be used when someone requires digital penetration for medical reasons, such as during a prostate examination or a colonoscopy.
An alternative interpretation suggests that the person being told to bend over and grab their ankles is in a passive and powerless situation. In this sense, the phrase may help the giver assert dominance, as it commands the receiver to accept penetration.