In addition to what everyone has written before me, there is another reason why you should not walk barefoot on the floor. There are a lot of nerve endings in the flats. When not irritated, they leave the muscles in and around the foot relaxed. There is a base on the flat foot. A flat foot, that sounds funny, but can be a very painful thing that can't be fixed. Just stop, insoles and good shoes (which are very expensive), at least to the extent that the muscles keep a lot of joints and joints in the right position and position. Outside, in the grass on the stones, the hookers are irritated, massaged and the small muscles are strengthened by activity and then they work very well. Keeps all small joints in proper function. (hi)