Two little girls sit happily side by side on the living room floor. Two little heads, one light and one dark, bend over a plastic spoon and a Capri Sun straw, stirring something imaginary. Two little voices meld harmoniously together, discussing their project.

I open the shades on the patio doors, allowing morning sunshine to stream into the room. Suddenly, a noxious odor assaults my nostrils, and I wrinkle my nose unpleasantly. "Whew!" I say out loud, examining the two cute daughters sitting innocently before me. "Something stinks!"

One dark-haired little girl suppresses a giggle and takes off at a dead run, careening drunkenly through the living room.

Aha!