Confused

Nicole • Expecting 2nd on August 21st. Our first Henry James was a full term birth on February 27, 2011 at 5:22pm and passed 6pm.
I walk into the living from cleaning up dinner and my lil was in the pack and play. There is a diaper on the floor and I think "where did he get a clean diaper from?" I pick it up and it's the diaper he was wearing! He's in a tank top that comes mid thigh so I couldn't see he didn't have one on. How does this even happen? And all he did was look at me and smile. This is bad, this is real bad. I see shorts in this lil's future!