Thanks for the interesting contributions!
Comfort: I don't think it's about comfort, as our dog doesn't spend much time 'fluffing up' his bed.
Peeing: It's definitely NOT a peeing thing. Our guy rarely (if ever) has accidents in the house and is very particular on when/where he does his business outside.
Pushing: My husband said that one day he saw him in the spare bathroom nosing around the bath mats. However, he's not *pushing* the carpets, not edging them along - It's a very dramatic sweep of his head, resulting in a rub on the *top* of his nose.
I don't get it!
I guess I could try giving him an old spare blanket, or piece of carpet, but he would still be getting a rub on the top of his nose! I guess I'll just chalk it up to a personality quirk and hope this is the extent of it!