"Friendships are an important part of a man’s life. Friends are those men you can count on when the chips are down. They’ll back you up even when the whole world is against you. Friends are those men who will buy you a beer (or a soda) when you lose a job or your lady dumps you. While the man friendship looks like a simple relationship, its history is actually quite interesting and complex. The virtues of duty and loyalty have remained the same guiding principles in man friendships throughout time. However, how men express those principles in a friendship has have gone through fascinating changes in the course of human history."