In a recent informal discussion during an elaborate lunch, President Hu Jin Tao, after a huge gin tonic, mentioned that he had received a report related to the problems created by Chinese style toilets.
Mr Hu Flungdung said "Apparently it's not the smell, or the puddles on the floor, or the lack of doors that creates the problem, but that the potty training of westerners makes it impossible for them to use these crouch-style toilets. Being unable to crouch comfortably, they often soil the back of their shoes, and the sewage on the floor makes it impractical to remove all shoes and clothing before defecating, as the inevitable contact with the floor causes the clothing to be soiled."
Hu said humorously "If western kids were taught to crouch instead of being potty trained, they would find China a much more satisfying destination."
Those researching this problem said that they had nothing to go on.