It's rude to ask someone how they got their scars.
Jack was at a bar, and the bartender there has scars on her face.
Jack wants to talk to the bartender.
Jacks asks the bartender how long she's been working at that bar.
Jack asks the bartender how she ended up with those marks on her face.
The bartender feels good that Jack is actually interested in her life story.
The bartender becomes uncomfortable and becomes mad at Jack for even asking.