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?
In a drawer you have black socks and white socks. They are not stored away in pairs. Without looking, how many times will you have to reach into the drawer to come out with a matching pair?