You and your friend are on vacation together. You're in a hotel room, and the bed was uncomfortable. Your friend asks how you slept, so you answer.
“Payment is due within 15 days. If payment is not received by that time, you will be charged a 10% fine.”
You just received a hospital bill. There's a note at the bottom that explains when you must pay the bill by.
Your close friend invited you to go out to a dance club. You say this to her because you definitely don't want to go.
You ordered a medium rare steak at a restaurant, but when it came the steak was overcooked. Your friend says that you should complain to the waiter. You say this because you don't like to confront people directly.