Ever since first human being descended on the earth, squatting has been the most natural posture to finish ones daily” business”. With advent of civilizations, human habits, food and several factors, flush toilet was invented. It gradually witnessed penetration in to the masses of western world, over few decades even eastern world (India, Pakistan, China, Japan, and Korea) chose to switch and stuck on to doing their business in seating position.
Later research studies revealed that seating position is against human anatomy causing lot of bowel related diseases like hemorrhoids, Irritable bowel syndrome, constipation, even colon cancer.
Sitting on a modern toilet places your knees at a 90 degree angle to your abdomen, which actually hinders elimination by pinching off your anal canal, as illustrated in the image below.
Squatting, on the other hand, places your knees closer to your torso, and this position changes the spatial relationships of your intestinal organs and musculature, relaxing and straightening your rectum. As a result, you maximize the efficiency of elimination.
Importantly, this prevents fecal stagnation and the accumulation of toxins in your intestinal tract that can fester and contribute to bowel problems and a variety of discomforts.
In fact, non-Westernized societies, in which people squat rather than sit, do not have the high prevalence of bowel disease seen in developed nations; in some cultures with traditional lifestyle, these diseases are virtually unknown.