Vampires are sparkly?

     Okay so can anyone tell me why Edward Cullen sparkles? He could wear wear a cool ring like the Salvatore brothers (Stephen and Damien) from The Vampire Diaries. He could rock some black rimmed shades more often, like in My Babysitters A Vampire (My introduction to vampires). But in the end? All that Edward does is sparkle.  

    If there a reason to sparkle then you are a killer. According to him if you sparkle you have "The skin of a killer". Sorry guys, I guess only killers can wear highlighter.