WTHIT

WTHIT is "What The Hell Is That". First of all, why is it called "what the hell", but not "what the heaven"? Is it because everyone do not mind going to hell or is it because the word hell sounds evil? Why not heaven? Doesn't it sound more pure? "What The Heaven Is That". Heaven and hell? Which is better? Who came up with that phrase in the first place? It makes me curious......