One can choose to obsess over prescriptive rules, but they have no more to do with human language than the criteria for judging cats at a cat show have to do with mammalian biology.
Steven PinkerAll our behaviours are a result of neurophysiological activity in the brain. There is no reason to believe there is any magic going on.
Steven PinkerPeople know there is a difference between what you do and what you accept. There is a difference between me knowing that people swear, me hearing people swear and me swearing, and everyone accepting that this is something you can do as much as you like.
Steven Pinker