Answer:
It happens when something has been cut with H2O.
What is round as a dishpan, deep as a tub, and still the oceans couldn't fill it up?
Break it and it is better, immediately set and harder to break again.
You throw away the outside, eat the inside, then throw away the inside. What is it?
We are all around, yet to us you are half blind. Sunlight makes us invisible, and difficult to find
What do angels sing in the shower?