Why do you think so? People were not shitting in the corner of the room like animals(if they had a choice), they would go shit outside and i am not aware of any historical ritual involving shit but let me know if there is some perspective I am missing.
I think there are still many people around the world that are living in extreme poverty and I am sure they still feel disgusted by shit,bad food and putrefied bodies - so are you basing your theory on something you read or is something you think is correct , I will be happy to change my mind so please inform me.
In an article on Cholera or more it's solution in London building sewers the author reposted a letter to the news paper that castigated the upper classes. The gist of it was 'You say we don't mind living in filth and stink. Assuredly we do not like it at all'
I would ignore cities since this is a modern thing and people were forced to live into those bad conditions, let's think about tribes and villages where you had the space to shit outside, even in cold winter the people would go outside and take a dump and not shit inside.
I think there are still many people around the world that are living in extreme poverty and I am sure they still feel disgusted by shit,bad food and putrefied bodies - so are you basing your theory on something you read or is something you think is correct , I will be happy to change my mind so please inform me.