My master surprised me with this two days ago while I was blindfolded and bound to his bed. I've been a bad boy recently, so master wanted to make sure that I didn't have any chance at all to misbehave over the next few months. It took a little bit of ice and a decent amount of lube to get my slightly oversized package into the tube, but once I felt that lock click into place I knew I wouldn't be getting anything anytime soon. It's only been 48 hours and I'm already begging my master to let me out.