This deserves some serious thought... perhaps even a new thread really.
Even for men who aren't interested in dating or marrying... are female relationships important? Women add softness to the world. Gentleness and compassion and maternal affection. I'm not talking about WOMEN women, but any woman... a mother figure or a sisterly girl or the pastor's wife who makes you cookies when you are feeling down. Aren't these things important even for men who have no interest in romantic love?
Same goes for men. My life would be sad and unbalanced without men in it. Fatherly types and brotherly types and people to look at things objectively and give advice or help me with my lawnmower. The world needs both men and women, and they make one another better.