Sleep Peeing

Well, Jonas is almost night potty trained. Last night, while John was still up, Jonas woke up and went to the bathroom. John was impressed that he got up all on his own, but then he heard the hollow sound of pee not hitting the water in the toilet and then the slam of the under-sink cabinet door. After Jonas shuffled back to bed, John got up and looked in the bathroom. Yup, the kid had peed under the sink.

All this begs the question, where else has this kid been peeing in the middle of the night?