>>130710
As I am reading forbidden book I noticed that the investigator or the criminial psychologist employee in the story, which appears also in the manga writes about blunt objects to the head while investigating a murderer. A murderer got hit when he was child, and henceforth became or in other words it is convergent. But it is not proven like actual evidence of harmful, just as convinient anectodal possibility.

the funny thing is I actually did get hit as a child in the head.
To this day I have physical print from that on my face. I wonder if that explains my mental issues, like the OCD? However, I think it is not.