Young Cashier: How are you today?
INFP: Doing well. How are you?
Young Cashier: Good.
INFP: And why is that?
Young Cashier: -starts- What?
INFP: Why are you good?
Young Cashier: -wide eyed- Uh... -giggles and hides behind her hands- No one's ever asked me that before... why are you asking?
INFP: I dunno, striving for integrity.
Cashier: I guess I'm not really good. I miss my mom and dad.
INFP: Why do you miss them?
Young Cashier: I moved here and I haven't seen them for a year.
INFP: Where are you from?
Young Cashier: California.
…conversation continues, talks about her parents, about life...purchase completes...
INFP: Well, thank you.
Cashier: You're welcome. -bright and somewhat astounded smile- It was really nice meeting you! Bye!
He does this to everyone, and the response is always a mix of bewilderment and appreciation. My INFP is awesome.