Sounds crazy but it's not. While our equipment is heavy if you can manage to shoot with one hand you can use the other hand to direct and motion to your model. I find myself doing this to either instruct the model to move left/right/forward/backward, use her hands in a specific way, point to things, all while dynamically shooting with the other hand. It's been surprisingly effective in addition to verbally communicating what you want from your model.
The next step is to learn to shoot with your left hand because you are now afforded the use of your right hand. In specific lighting situations where you must hold a reflector with your right hand, now you can still shoot with your left. Impossible? No. Difficult? Yes.