There's Toothpaste On My Ceiling...

There's toothpaste on my counter,
and in the sink,
and on the bathroom floor.
With four rugrats in the house,
it's not hard to see why.
But....
There's toothpaste on the couch,
and on the chair,
and on the front door.
This too can be explained.
for when the doorbell tolls,
four rugrats race to answer,
toothbrushes in hand.
BUT....
There's toothpaste on my ceiling,
and this remains a mystery.