My dog takes obstinate to a new level

Why...
Does my dog dig his heels in? The lamppost. Simple enough to walk around. Yet, if my dog passes one side and I the other, with the lead wrapped around the post, my 12kg dog becomes a 100kg anchor. Getting him to come back around the lamppost to unwind the lead is as likely as me finding a tap-dancing oyster. ‘Lamppost etiquette’ in dog lingo means whichever way he walks around it is sacrosanct, and it is I who needs to change direction. This refusal to move is indeed a canine unwritten law, as on my walks I see other owners being forced to do the same thing and unwind themselves for the benefit of their pooch.