This has started happening to me lately too! Usually about 9 o'clock after the little 'un is tucked up in bed and we've settled down to watch something good on TV.
Next thing I know is the shock of waking myself with a snore/snort and coming sharply to attention, followed by the sharp pain in the neck that always accompanies the fly-catchers cat-nap.
"Did I miss much?" I ask hopefully, which draws a rolling of the eyes from my beloved,
"Fancy an early night?" still hopeful, wiping the drool from my face.

Not the most attractive of my habits, apparently.