Do you bite your nails? Do you tend to eat when you’re nervous? Do you exercise every single morning? Do you take notes during class?
These are all habits. Some of them are good, others are bad.
People start developing them from a very young age, and some habits stick with them for a lifetime. What most people fail to realize is that they can influence these habits. “It’s just the way I am” is not a valid excuse. You’re a conscious human being with power to decide for your own actions. So you can change your habits if you try hard enough.