— May I borrow your pen?
— +Do. Do you want a black one or a blue one?
— Which one shall I choose?
— It’s up to you. You must make up your own mind.
— I can’t draw a line.
— Well borrow a ruler.
— Well give up the idea. I borrowed her ruler two weeks ago and I lost it somewhere.
— You must pay for it.
— Think of something, you helpless man.
— Maybe I should buy her another ruler or a bar of chocolate instead.
— Clever, aren’t you?