Senior year of high school, we did a lot of peer editing in my English class. That was when I first realized that I used a syntax technique that my classmate thought was something wrong that I made up. So then I got paranoid until college, when my Shakespeare professor said that he used too many em dashes. Then I thought, "Wait, I use dash-thingies. M dashes? Is that a dash-thingie? I thought that was a hyphen. Is using too many hyphens wrong? I use them a lot. But so does he. I don't really like him. Is this bad?"
That is when I started researching dashes and their uses. I found out that there are three dashes: the en, the em, and the hyphen.