It was an accident.

Lukas is still working on the nighttime/naptime potty accidents. The other day at the end of his nap, he woke up whining because he had peed the bed. We brought him into the bathroom to get clean up. We try to comfort him and let him know it was an accident and accidents happen.

I said to him "Uh-Oh Lukas, What happened? Did you have an accident?"

And his reply was "Yeah. My body couldn't hold it."

Not sure where he thought of that, but it was pretty darn cute how it was "My body" rather than "I".