bonding over walks is actually one of the best ways of communicating your thoughts with the other person. ofc I don't have any research or anything to back it up, but whenever i hit a blocker in life, i take a walk with my bestfriend in and around the college campus. 99% of the problem is solved by the end of it. however if i do the same thing elsewhere, like our room or some place to eat, the flow of thoughts isn't that coherent or fruitful. maybe the active work of walking stimulates our brains to think out stuff properly.