Apologize in advance if this topic was covered somewhere already and I didn't see it.  I remember mine.

I remember very clearly. I just started my orthodontics treatment.  I get me lower braces put on and my top expander with facemask.  The ortho assistant was showing me how to brush with my new additions and how to attach the facemask. She was probably early to mid 20s.  She literally said "if you don't brush twice a day your gums will grow over your braces and teeth and we'll have to fix it.". I was a kid and it totally freaked me out.  It worked, I brushed religiously but didn't comply with treatment.