Life in the oceans must be sheer hell. A vast, merciless hell of permanent and immediate danger. So much of a hell that during evolution some species—including man—crawled, fled onto some small continents of solid land, where the Lessons of Darkness continue.
There is one excuse for every mistake a man can make, but only one. When a fellow makes the same mistake twice he's got to throw up both hands and own up to carelessness or cussedness.