Thirsty and hungery

Question: You are driving and you are hungry and thirsty.On the road you find 2 doors.1 has food and 1 has water(drinkable).:Question:What door do you open first????

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 tastes better than it smells?

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

Question: What loses its head in the morning and gets it back at night?