There is seven-eights of it under water for every part that shows. Anything you know you can eliminate and it only strengthens your iceberg. It is the part that doesn't show. If a writer omits something because he does not know it then there is a hole in the story.
The water reached up for her, pulled her down tenderly out of the heat, seeped in her hair and ran into the corners of her body. She turned round and round in it, embracing it, wallowing in it.
But love is much like a dam; if you allow a tiny crack to form through which only a trickle of water can pass, that trickle will quickly bring down the whole structure and soon no one will be able to control the force of the current.