Pegging is a sexual practice in which one partner uses a strap-on dildo to anally penetrate another partner. The term was popularized by sex columnist Dan Savage in 2001, though the act itself long predates the word.
People come to pegging for varied reasons: some enjoy the physical sensation of anal penetration regardless of gender, others are drawn to the role reversal it can represent, and some couples use it as a way to explore power dynamics or expand what sex can look like between them. It shows up both in casual sex and in long-term relationships, with all genders participating in either role.
Worth knowing: Use plenty of water-based or silicone-compatible lubricant, communicate beforehand about comfort and limits, and go slowly since the receiving partner controls the pace.
Also called: strap-on play, anal play with a strap-on, pegging roles (giver/receiver), harness play