To answer your questions:
Azzy - "Does this necessarily lead to Marriage?" - answer is NO. because you may find the qualities you want in a woman but then does she find in you the qualities she wants in a man. Marriage is a decision of two persons not just one.
Owen - "what's this obsession with br...s" - It's not an obsession. It's to test the quality of the "reservoir of the sustenance of our future offsprings" so it will bear the seal "Kid tested, Father approved!" :)