The couple were used to their golden retriever’s strange method of letting them know he wanted to go outside. To them it was just commonplace. However, it became more pronounced when they moved into a new house, leaving his owners both amused and baffled.
In the absence of mind-reading, humans don’t know for sure what our pets are thinking. We can read their body language, and when we get used to their idiosyncrasies, some of it makes sense. But then they go and do something completely out of left field.