If you throw me out of the window I'll leave a grieving wife

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: My thickness is no more than a few centimeters, yet my depth can span to infinity. Although mundane, I intimidate most animals. When in my presence, you will inevitably follow me. What am I?

Question: What has a face and two hands?

Question: Some people peel my skin some people don't, you eat me nevertheless, with or without, what am I?

Question: What tastes better than it smells?

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