[tomwalker]

There is something else to through into the argument- flexibility.

The use of western toilets reduces our ability to reach the full squat position and some reckon this is why pulled hamstrings and achilles injuries are more common.

When western people squat, we tend to go up on our toes to reach full depth due to our inflexibility gained from using toilets.

This inflexibility changes the way we do things- when a western adult wants to pick up something from the floor they bend over at the hip. Watch a young child that has recently started to walk do it- they do a full squat with their heals on the ground!