I love dogs, which provide me with much that is good in life. But I would not have dogs if I had to walk around my house picking up their droppings all the time. Instead I train them—if you like, I regulate their behavior—so they can’t leave their droppings in my house. It’s an inconvenience to them, and a limit on their freedom, but it saves me having to clean giant piles of dung off my floor.