A man walks into an inn and greets the innkeeper at the front desk. The man asked the innkeeper for a room and the innkeeper says, "Ok, $15 for a room, $5 if you make your own bed."
So the man says, "Ok, I will make my bed"
Then finally the innkeeper says : "Great, here is some wood and nails. Get working."
[H/T Say Grace...on plurk]