You don't need air, silly. Your vision going dark at the edges is just your ability to resist going away. If you black out with cock down your throat, it just means that you are more useful unconscious. Brain cells are overrated anyway, ruin yourself for cock. Be a better toy.
my puppy had picked up the mannerism of saying “please dont hurt me” after saying something stupid. i guess i punched the mutt so hard when she was over that shes been conditioned