I often find my dog putting his head between my bed and the nightstand, or between the chair arm and my lap.
Some websites say this a sign of the dog trying to assert dominance, others suggest it's a sign that the dog wants to be pet, or say hi.
Is there any definitive answer on this topic?
Edit: Ok so the dominance theory seems to be bunk. (It's a shame that it's the most common answer on google right now) So I'll add some more to my question.
Often the dog seems to have "sad eyes" when putting his head between things. His ears get squished between the objects he is putting his head between, so I don't know if they are flat, forward or backward. Often the rest of his body just 'relaxes' (don't know tail position, but I can check next time.)
In addition to putting his head between furniture, he also, when in the car will sometimes squeeze his head between the driver's chair and the window.
Edit: Observed my dog a few times. The ears are flat facing back towards the body. The tail is hanging limply, a bit between the legs, but not really between the legs, and not curled forward. He never does this while siting, he is always standing on all four legs.