I watched Titanic last night/this morning. Coincidence. I also saw a data chart approximating the number/percentage of people (divided in women, men, children, social class/status on ship) who survived or died after Titanic sank. Of course, not every single person can be accounted for, but it's an interesting sight, you can see it on the Titanic wiki page. I think it's just likely due to the fact that men are generally going to have an advantage in a survival situation at sea. From another view, a woman can only bear a child or two at a time, so from a reproductive/regrowing society standpoint, saving more women than men is sort of logical. And because of that disadvantage, it's possible that men might feel compelled to put their survival over their own.