Why is this the answer?

The answer is horse because this is a super clever riddle that wants you to think outside of what a person does before bedtime. When you hear the word "shoes," you probably picture your favorite pair of sneakers or maybe your boots. But the riddle is actually talking about a special animal and the protective gear it wears. That animal is the horse! The shoes a horse wears are called horseshoes. A horseshoe is a U-shaped piece of metal. It is not something the horse can easily put on or take off itself. A skilled person, often called a farrier, carefully and safely attaches the horseshoe to the bottom of the horse's hoof. You can think of a horse's hoof as a very strong, thick version of your own fingernail. It is a tough material, and the farrier uses special nails to gently secure the metal shoe. This process does not hurt the horse, just like trimming your nails does not hurt you. The horseshoe's job is very important. It keeps the horse's hooves safe from rough ground, especially if the horse walks on concrete, rocks, or hard paths all day long. Because the horseshoes are hammered onto the tough hooves for protection, they are meant to stay on for weeks at a time. When a horse goes to rest or "goes to bed," it does not unlace or kick off its horseshoes. Whether the horse is just standing and dozing off or lying down comfortably in its cozy stall filled with hay, those horseshoes remain firmly in place. This means that a horse is truly an animal that always goes to bed wearing its shoes. It's a wonderful word puzzle that plays with the two different meanings of 'shoes' for people and for animals. This little detail about horses is what unlocks the secret to the riddle.