How to Breathe Properly With Your Mouth

i broke my nose in college playing basket ball, and ever since then, just hasn't really been the same breathing out of my nose. So we dreamed up e experiment in which me and one other person, that was the maximum amount of people we could get in here. We plugged our noses for ten days and calculated what happened to us. Because i had been told by many doctors that how we breathe doesn't matter. Get air in your body'll do the rest. An wanted to experience this myself....