Well all of my friends and I came up with nicknames for each other, and they all gave me Dex because 1) I'm smart and 2) for some reason I seem like Dexter from Dexter's Laboratory. My full nickname is Dexama (no clue where we came up with this) But I prefer Dex. Some other forms are Dexa Dexy and DexyDawn (Dawn is my last name... it kinda fits. :D)