http://www.thesquattypotty.com/
The idea behind the "squattypotty" makes much anatomical sense for human beings seeking to defecate properly.
If you look far back into history, you will find that many civilizations used to squat in order to defecate. Even up until the early 19th century, sitting toilets were pretty much considered a luxury for the very affluent/wealthy.
If you go to many European countries, you will find that certain regions still employ the squatting toilet as a means for "going".
For any of you that frequent Thailand, you will find that the vast majority of establishments still use the squatting toilet.
It makes great sense, when you stop to think about it.
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