This article is the TRUE truth about Creepers.

  They appear as: brownish-green four-legged monsters with no arms, and Notch, the creator of Minecraft, states that their feel would be like "Dry, crunchy leaves." They explode when you get near them, and are very popular when speaking of Minecraft.
  Now, if you were to bring up the subject of Creepers when talking about Minecraft, the comments vary from "I hate'em! KILLEMALL!!!" to "I love them so much! They're fuzzy." But the truth is, pixelated pals, Creepers just want a hug.
  Creepers are born with TNT inside of them. They are actually very friendly. But they are allergic to players, and when you get near them, they start to sneeze. And when they sneeze, well... Let's just say that there's a large boom. To prove my theory, try going on Creative Mode and spawning a pack of them. They are so friendly! You see, when you are on Creative Mode, you are not as "real" as when on Survival Mode, and you don't have the scents that they are allergic to.
  So there you go! That is the unexplained truth about Creepers. Don't believe me? Fine, we all have rights... But don't blame me if they grief your home after saying I'm wrong... Actually, if your house is griefed because you don't believe me, it was probably me, not Creepers. >:D

 ~CommanderRadiated out!