Hide & Seek Sammy

I'm not quite sure what's going on with our dog, but lately he's been all about hide & go seek (only he's the only one who knows we're playing). While he used to almost always sleep with us, now he sleeps here, only underneath the tablecloth. Why is he hiding?

Poor Keith tried to find him forever the other day only to discover he was hiding under yet another tablecloth in the house. Does he not want to be found? Is it cooler under there? Does he just want to be alone? What is going on with my sweet little boy???