There are a lot of things in the world that people enjoy that aren't really healthy. Coffee is one of them. To put it bluntly, it is a type of drug: It is highly addictive, expensive, and counterproductive.
I swore that I would never drink coffee again after it made my heart beat faster and causing an insomnia.
Studies show that coffee can also cause headache, depression, and weaken bones. Coffee is not really good for your brain. That's why children and teenagers should never drink coffee, since it interferes with their brain development. Even for adults, coffee does more harm than good.
If you don't believe me, listen to this guy. I'm not trying to scare you or spoil your mood; I'm just trying to tell people how dangerous coffee can be.