If you're a twin, you know the simple, unique things that happen throughout your life that doesn't happen to anyone else. You share a birthday, you have a certain bond that no one else can relate to, and you grow up together in the same environment. It's an amazing experience that you may not cherish at first, but as you grow older you start to realize how much of a gift having someone so close to you is. Fraternal or Identical, every twin could relate to this list in different ways.
1. Identical or not, your parents dressed you in the same clothing.
It was probably a really annoying idea at the time, but you look back now and see how cute the two of you were.
2. You were called your twin's name a total of 50 times a day.
I don't live with my parents anymore and they still call me by my twin's first name frequently.
3. Growing up, there was two of everything.
Everything came in two, just so it wouldn't end in a screaming, hair pulling, and name calling disaster over a toy.
4. You are very protective of your twin.
You could beat up each other all you want but to this day you still get defensive if someone else tries to mess with the other.
5. On your birthday it isn't "My Day" it is "Our Day".
You both had to decide on what kind of birthday party you wanted, what type of cake, and who you wanted to invite. You hated sharing a birthday when you were little, but now it's a special day that celebrates the both of you.
6. You know them better than anyone. 
Growing up, you knew what their favorite activities were, you knew what they were thinking when they made a certain face, and you definitely felt like you could tell what they were going to say before they even said it. Twin telepathy maybe?
7. You miss them more and more the older you get.
You got annoyed with them growing up, but there are times where you really wish they were there with you.
8. People are 'shocked' when you tell them you have a twin.
What? Have you never met twins before?
9. When people find out you're a twin, you get the dreaded, "Who's the Evil Twin?" more times than you'd like to count.
This is an annoying question but It's definitely not me...
10. No matter where you two go in life, you will always have an undescribable bond with one another.
Thanks for being there for me when times are rough, and always being one of my biggest cheerleaders.