I go home to see my mother on the weekends a lot at the moment (temporarily of no fixed abode). When I start getting ready to leave at around 6pm on a Sunday t

I go home to see my mother on the weekends a lot at the moment (temporarily of no fixed abode). When I start getting ready to leave at around 6pm on a Sunday the dog will lie in the Hallway between me and the front door. We consider that he knows I'm about to leave, and that's why he's there. I spend plenty of time in my room without seeing that behaviour. Am I suffering from brain damage in anthropomorphising his behaviour somewhat? Or am I simply choosing the explanation that gives me the most comfort? The reality is I can't tell why any human being does something, regardless of the fact they can actually talk. I choose what to believe as the motives for them, and do the same for my dog.