Is there a problem with the bedside facing southwest?

According to the principle of universal gravitation, it is best to go north, because the earth is a big magnet. Its magnetic field lines run from north to south. When you sleep with your head facing north, the magnetic field lines just run through your whole body, which will help you sleep. If you go south, it will have the opposite effect, but the problem is not big. It's best not to sleep with your head facing west or east, which will block the magnetic field lines, affect your sleep and easily lead to insomnia. The southwest direction is slightly better and the impact is slightly smaller.