Tipitaka knowledge on relation between behaviour and movements of private organs

Elaboration:: There seems to be a relation between daily-life behaviour of a person and movements associated with **his** private parts. These movements can be internal, can be external. Eg. are hardening during sleep, release of harmones(knowingly or unknowingly). Even the fluctuations in hardness seems to depict deep thoughts-with-behaviour of person, like egoistic speech, greedy thinking pattern etc.... **whose stored force(in form of sankharas, probably) gives fluctuations in hardness**. I tried to find on internet, couldn't find. **Are there any chapters dealing with such knowledge in tipitaka(of any tradition)?** *(this time, it's not a challenge, rather a query.)*