I have recently been thinking over sex in the context of primitive survival. A female, especially with a child, without a male protector, would not survive. Females would have needed to make sure that they had a partner who was going to stick around before mating. Fathers and uncles and brothers would know this and beat to a pulp anyone who tried to do otherwise. So why then, does it seem that so many males want to spread their seed far and wide? Why is it so hard to find a guy who will not require sex in order to decide if he wants a realtionship?