A mouse in the house
A: I am in big trouble!
B: Oh, what's that?
A: I saw a mouse in my house!
B: Well, all you need to do is to use a trap.
A: I don't have a trap.
B: Then, why don't you buy one.
A: I can't afford one.
B: Ok, then I'll give you one.
A: Oh, that sounds great.
B: All you need to do is to put some cheese in it.
A: I don't have any cheese.
B: Then, put a piece of bread in it.
A: I don't have any bread.
B: Then, why don't you put some sauce in it.
A: I don't have any sauce.
B: Then what is the mouse doing in your house?