One of my favorite stories about my parents is wonderfully simple.

One night my dad went to bed early and, as a joke, turned himself around so his feet were on the pillow and his head was at the foot of the bed. When my mom came in, she followed her nightly ritual — leaning over to give him a gentle kiss goodnight.

Only this time, she kissed his feet.

The funny thing came next.

She didn’t even notice.