So I've tried the Marshmallow trick before. It was pretty awesome, but I've never been able to hold it much longer than a few minutes. So I had an Idea. I put the marshmallows in as usual, but then I put a butt plug up there and taped the plug securly into place. So far it's been in for about 15 minutes, and it is INTENSE. I get the urge to push, and when I do nothing comes out, just an amazing full feeling. I'm not sure how much longer I can last without taking it out.