It is not necessary to wind the watch if you are not wearing it that day.
At right, the crown is un-threaded and pulled to the farthest notch. When new, many of these timepieces were designed to withstand a fall of no more than three feet on a raised wood surface.In certain rare occasions, a watch can become so magnetized that magnetism can only be removed by disassembling the watch and demagnetizing individual components.Though magnetism is in our experience, the most common cause of malfunction, there are a number of other possible causes or explanations, and it is important to remember we are discussing items which are mechanical: everything can be fixed.If you wear an automatic watch every day for 6-10 hours and are reasonably active within that period of time, it will still be running when you put it on in the morning, because the movement of your arm will build up an 8-10 hour winding reserve.If you do not wear it for a day or more, it will stop. Many Rolex ‘Oyster’ models feature a patented screw-down crown.
All of that direct exposure could lead to a timepiece becoming magnetized.