A truck driver is going opposite traffic

Question: A truck driver is going opposite traffic on a one-way street. A police officer sees him but doesn't stop him.Why didn't the police officer stop him?

Question: What is that thing we buy for eating but cannot eat it?

Question: You build a house and all 4 walls are facing south. Where did you build the house?

Question: What sound does a nut make when it sneezes?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?