system
Given the following post, respond as if you're commenting on Reddit:
human
[Daredevil (Netflix)] What gives Kingpin his superhuman durability? (Spoilers)

In the last episode of the first season of Daredevil, Murdock and Fisk finally get to face off. In the fight, Fisk receives repeated blows to his unprotected head by Murdock's sticks, which I can only assume are made of metal. This annoyed me a bit, as it broke my suspension of disbelief. Wilson Fisk is a normal human who happens to be a very good hand-to-hand combatant. Anyone else receiving multiple strong blows to the head like that would have a concussion at the very least, but more likely severe brain damage. So how was Fisk able to withstand the blows with no ill aftereffects?
gpt
Have you ever seen those powerlifter dudes who train to break cement blocks with their forehead? Fisk's genetics allow him to have that sort of bone density/durability naturally. He would dominate any sport that involves strength or durability if he hadn't chosen a life of crime. 

Also, consider the fact that peak humans in this comic book universe are at a higher level than real life peak humans. (in fact, this is the case in most fictional universes) A genetic beast like Fisk will be tougher than any real person.