Everybody knows how to breath, and that is taken for granted because we all do it and we all seem to do it right, since we're not asphyxiating. Now, breathing right for proper oxygenation and prevention of side cramps or "stitches" is something totally different.
Just came back from my daily walk, and today I tried to sustain proper breathing throughout the exercise. It is amazing how hard it is to get rid of your wrong breathing habits and substitute for a right one. I just ended up figuring that we often take things for granted just because they are natural and we don't care to improve, while thinking we totally own the technique. Breathing is one example, and I'm suspicious that walking is another... Gotta figure if I'm doing it right!