An idea, pretty much improvised (so don't expect a well planned script). You should listen to this file wearing a diaper, it will last until you take it off (though other baby-like items such as pacifier or blanket can lock on the effect, allowing a 'mommy' or similar to change you). You will think I was trying to make you a baby, but you're still a big boy. You're a big boy, three or four years old, who isn't going to wet his diaper, and is so proud of this, even as the urge to pee in that diaper grows and grows. Eventually, of course, you'll lose control and then finally you'll become a baby until the diaper is removed.