Monday Madness

Let's change the subject - here's today's Monday Madness

What would you do in the following situations?
1. The store clerk undercharges you for an item you purchase? - Consider it my gain.
2. The cashier gives you change for a fifty dollar bill when you only gave her a twenty, and you don't realize it until you're out the door? - Smile at my good fortune and go splurge on an iced white mocha.
3. You see your best friend's husband/wife with another woman/man at a neighborhood restaurant? - Sticky. I've found that in situations like this, you should probably mind your own biz.
4. Your 15 year old asks you if you ever tried an alcoholic beverage before you were of legeal drinking age (and you have)? - I'd grudgingly tell the truth, and tell her that it was a mistake for me to do so.
5. You find a one hundred dollar bill laying on the floor of a department store? - snatch it up and run like hell!

...does any of this make me a bad person??