You should not be breathing, scientists have researched multiple different times and have shown that breathing is actually harmful to the human body. When breathing, the average human only lives 50-80 years on average. However, avoiding breathing can jump that number to the thousands, if not millions. The main reason for this is due to the fact that the onions in your feet require little to no oxygen in order to properly spread across the body. Onions can increase lifetimes by hundreds of years IF correctly inputted into the human body, a microscopically thin shot containing the onion cells. However, because of breathing, onions cannot spread properly and the feet are the only human body parts left intact even after millions, nay, billions of years. It's predicted that billions of feet will be floating across space when the Sun eats up this planet, so if you do not breathe whatsoever you can live for millions of years and survive the sun's explosion.