What about the owner of the coffee table with his back to the window?

Not so good. The host has his back against the window. When receiving a guest, the guest may not see the host's face clearly because of the light, which is very disrespectful and impolite to the guest. For a good quality coffee table, the beauty of the coffee table can be better reflected under the irradiation of sunlight. If there is no sunlight, it will not only reflect the beauty of the tea table, but also add a depressing feeling to the tea table. In addition, leaning against the window will psychologically feel that the back is empty. Therefore, for the owner of the coffee table, it is best not to lean against the window.