Close your eyes. Exhale - fully.
Accept the emptiness of your lungs, and the simple clarity which follows this purging. You are out of air, you feel the need for it, you're sinking towards suffocation, yet you feel pure.
When the need becomes imminent, before it becomes uncomfortable, submit to the need to breathe
Feel your environment rush into you, invade your body and fullfill the urge. When you are satisfied, purge yourself again and repeat, being aware of the waves of air which drift through you.
This is not how you breathe.
This is how you make love to your environment.