God has become a snooze, while Satan seems to portray a fun, exciting, action-packed life. Nobody wants to have breakfast at Tiffanie's anymore, when they can have dinner with Hannibal Lecter.
I am obsessed with finding an answer to this question, as I just finished writing an article with the same title, but was hard pressed to find a satisfactory answer during my reasearch.
Check out my take on it by reading the, What Makes Evil So Damn Sexy? article on my SEXYOUALL Sexual Advice Blog, then leave your theory in form of a comment down bellow.