This is the reason I became a locksmith. Got to love the jealous husband
Back in my youth when I was hanging out behind the counter at a tattoo studio, same sort of thing use to happen. The chicks would come in and drop their pants and show me their brand new tattoo, when they had accidentally knocked the scab off.
I use to ponder and rub my chin and umm and arrr then say, "All good, it shouldn't effect the tatt".
http://youtu.be/rnM90hBMb1U