The interesting thing about dreams is that they occur typically in the less "deep" parts of our sleep. And the ones we remember are typically the ones toward the morning. In most situations, your muscles are paralyzed during these dreams so that you don't hurt yourself or sleep walk. On occasion of course, you may find yourself tired because you were active during the dream but it is unlikely in most cases that you were active in your dreams all night long. If it is the case that you are very mobile during your sleep and dreaming and you are consistently tired when you wake up, you may need to inquire about this to make sure you are getting the deep restful, non-dream sleep that your body needs to repair itself.

There are a lot of opinions on the meaning and source of our dreams so I will not try to stab at why you are dreaming the things you dream. But I do think that dreams in general are a good release. When we are awake, we dream of being things like, Tiger Woods or an astronaut, etc. My opinion is that sometimes our dreams at night, though fanciful and removed from reality (in most cases), do allow us to fulfill, albeit temporary, things we wish we could do in day to day life. Now, I suppose if you were controlling dreams that caused you to commit evil acts that you could connect with true feelings during your waking life, it might be psychologically not healthy to move forward with these actions in your dream...though there are personal theological and philosophical biases that start to emerge as I say that, so I will stop here.

Eric