I find most people think I am a lot older than I am and I won't correct their assumption unless they actually ask how old I am. I find when people find out how old I am, they can change their view on me "Omg you're so young!" I have one co-worker who loves to bring up our age difference "When you were born I was graduating from high school!" and little comments like that, is it really necessary to do that? It's like they feel like they need to belittle you by reminding you of your age. Yes, I am young, but I also know that I am mature for my age, so it annoys me that I get judged on the number, rather than the person I am.