I came back from the UK recently and have to stay in my friend’s home which has only Indian Toilet (Squatting Type). When I was using Indian Toilet - Whoosh… the whole business took less than 2 minutes and it was effortless. I normally take 5 - 10 minutes while using a Western Toilet. Once I moved to my apartment which has a Western Toilet (Sitting Type), going to the bathroom was not a breeze anymore. That triggered this research about the natural human defecating postures.
It’s not that I am new to Indian Toilets. I have been using it since my childhood. I started using Western Toilets about 9 years ago. Only when I got a chance to use the Indian and Western, one after the other - I could realize the difference. Have a look at the below diagram which shows the anal-rectal angle, while sitting and squatting. I don’t need to explain which one would be a better posture for this job.