Yesterday, after shaving (one of those hate-it-when-I-don't, hate-doing-the-thing, things), I slipped when unscrewing to remove the blade, and sliced the top of my thumb off... oopsy. It's not terrible, but the flap almost certainly didn't go back where it came from, and a bunch of the edges died away (I cut the dead bits off, leaving smooth patches from underneath). ... it's got me wondering - do fingerprints come back or slowly go back to what they were before?