"What's at issue is a developing control over sensory processing."

Why kids insist on wriggling out of the coats you keep trying to bundle them up in.

Kids would rather be the way they came into the world: naked. And as they adapt to the world of clothing, extra layers -- particularly coats -- add to their heightened perception of constriction.

"It feels like they're being really tightly bound, and it feels bad," says pediatrician Lynn Wegner.

And, let me add, it's not just coats....