Clean riddles

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

What gets wet while it's drying?

Peter celebrated his birthday on one day, and two days later his older twin brother, Paul, celebrated his birthday. How could this be?

How do you make the number one disappear by adding to it?

What can you hold in your left hand, but not in your right hand?

A bus driver was heading down a street in Colorado. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

What nuts give you a cold?

If you have one pound of rocks and one pound of feathers, which one will weigh more?

A word I know, Six letters it contains, Subtract just one, And twelve is what remains.

I travel all over the world, but always stay in my corner. What am I?