About the biorhythms.
When I was studying in the universe, I was a crapper, because I was better able to absorb large amounts of information in the morning, from 5 to 7 p.m.
When I went to the sea, I could sleep anytime and anywhere, even standing, because there were almost no other options.
Now I have my own company, and I’m a frog, because analysis and creativity are overnight.
I summarize: shit is all that, sweaters. These are just habits due to the way of life, the specificity of work/study, etc.