The seat of a man does not endure all the weight of a person sitting on a chair. Part of the back and also the legs help in this work.

The seat of a man does not endure all the weight of a person sitting on a chair. Part of the back and also the legs help in this work.

The seat of a man does not endure all the weight of a person sitting on a chair. Part of the back and also the legs help in this work.