You know, I joke about this all the time... why, just the other day, I told Short Stuff that if he dumped me into the north atlantic for a few hours, he'd have a "Pop-cicle".
You might've been a passenger on the Titanic.
You have an inner strength and calmness that could have developed during a traumatic past life experience. You seem very protective of the people you love, and you'd do anything to keep them safe from harm. Maybe you were a child's nanny on the Titanic, and your only thought after the ship hit that iceberg was to get the baby onto a lifeboat. If you stay focused in the face of danger, it could be because you developed that ability a hundred years ago on the open sea.