I knew you were coming over to work on our group project together, but I wasn't expecting you until after dinner. You start realizing my bedroom smells different, like baby powder or something. Then as I start to nervously shift, the crinkling sound you hear gets louder and louder. Finally, when I absentmindedly bend down to grab something out of my backpack, my school skirt rises up and exposes my secret: I'm wearing a diaper. I beg you not to tell anyone, it's so embarrassing my Mommy makes me wear them. At first I started wearing them because I kept wetting the bed, then she said my behavior was much better when I wore them all the time at home. You start to feel bad when I get upset, so you ask how to make me feel better. It would be so much better if you wore a diaper too, so I wasn't in it by myself. Being my best friend, you agree and I get so excited to tape you into a matching diaper. This is way more serious than a pinky promise, it's a crinkle promise. We'll be crinkling bffs forever now!