Your skin, especially the naked parts are exposed to natural driers like sun and wind along with the unnatural effects such as dirt, toxins. Exposed by these effects makes your skin extremely dry. Morever, soaps and other chemical cleaners make contrubiton to dehydration of your skin. In order to prevent dehydration, the best option you have got is using a quality moisturizer in a regular manner. Best practice is applying, in the mornings plus after every shower. Of Course, your face wants more attention than your body. You can use two different Moisturizer for your body and your face.