What can you catch but never throw?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

It belongs to you, but other people use it more than you do. What is it?

People put me on the table and cut me but do not eat me. What am I?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

The more it dries, the wetter it becomes. Can you tell what it is?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

What word is pronounced the same if you take away four of its five letters?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?