My son has this figgered out, early in life, and I am sure it will stand him in good stead for years to come. See, from his Navy service on a sub, he has learned how to talk (and appropriately) in his sleep and even look alert and interested. I saw him put this to use one day when my dau-ibn-law spoke to him while he was half-asleep on the couch. He answered, perkily, "You're beautiful, baby! I love you! And you're right, as usual!" And went right back to snoring, with a big shit-eating grin on his face.

~S~