Have you ever stolen something and gotten away with it? Did you feel guilty about it later?
Heh heh. Sort of. I used to work in a discount store putting away merchandise that people had left lying around. One day, I picked up a pair of earrings and put them in the pocket of my work smock...
And forgot about them for days.
Which means that I stole the same pair of earrings about four times before I caught myself.