In case you're out of lube, and you're rushing home to try this, the good news is the Colt Gear folks have included a packet of lubricant. Slicked-up and inserted, your butt is now ready for this pliable plug's exciting feature: expandability. A few squeezes of the pressure bulb and the plug fits even more snugly in your rear. A few more and it's a gentle, fist-sized object - without the rectal-ring discomfort associated with that endeavor. When you're ready to remove it, one press of the push-button release valve returns the plug to normal size. Aaaaah! Good.