It might "seem" that you're constantly dreaming, but it simply isn't so. Also, it is quite natural and normal to dream. If you truly feel that you're dreaming more than you normally do, it's probably because you nap. The longer one sleeps, the longer one's dream cycles become and the time between each dream cycle shortens. In other words, the more you sleep, the more you'll dream. Babies and young children dream more often and enter into dreaming quicker because they nap more. The same with adults who nap more often.