"
Air is spongy and compressible, which means if you create a vacuum inside a tube with air, the air that remains simply spreads thinner inside the tube. This means the penis can expand unevenly, creating possible bending and bulging of the penis. Water on the other hand is incompressible, so when water is pumped from a sealed tube around the penis, the water cannot spread out to help fill the gap and that means the penis must expand to fill the full volume of water removed. As water is incompressible it forms a solid cushion around the penis, allowing for uniform expansion without bending or bulging."
what a load of bullshit...air does compress but it does not "spot compress" or compress unevenly
air is a fluid just like water