Fun Riddles

Question: If a white house is white and a yellow house is yellow, what color is a green house?

Question: Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not.

What is it?

Question: The more you take, the more you leave behind.
What are they?

Question: If you throw me out of the window,
I'll leave a grieving wife.
Bring me back, but through a door,
You'll see someone giving life.

What am I?

Question: A man shaves several times a day, yet he still has a beard.

Who is this man?