I meant "natural" in the context of that environment where the burns of rough life with a lack of good food and bad living conditions like smelly toilets, no electricity, and no water, the natural shelter we all took was the pleasure in endorphins released into the brain.

Many of us could not get proper sleep due to these conditions, and more common was to watch porn and release endorphins and get tired and get to sleep quickly. There were some expcetions, some of them resisted all these bad habits, but most of us statistically got into one thing or the another.

"Natural" was used in the sense of a higher statistical probability of people taking shelter into that habit to escape from the heat of life.

A better word might be "naturalized habit".