I can as long as I'm not passing out.
Here is the thing about dreams. They are creation of your own mind. Henceforth, you have the ability to control your thoughts on a limited conscious level. When you dream, there is a consciousness associated with it. The issue is that you only dream for a very short time during the night before you fall into a deep unconscious state. You dream during a stage called R.E.M (Rapid Eye Movement). That lasts for a very brief period of time then your out like a light.