Here is my theory on men and women. When a man meets a woman he decides within around thirty seconds whether or not he finds her attractive. If he doesn't, they become friends. If he does, they might become friends, but the potential for them to become lovers never quite goes away.

When a woman meets a man she decides within around thirty seconds whether or not she finds him attractive. Even if she doesn't, they become friends, but at any given point in their relationship, she could fall in love with him. She could fall in love with him because he's kind, sensitive and he makes her laugh. Because she grows up and realises that sexual attraction is not the be all and end all to life. She realises that all guys aren't jerks. That all guys aren't boring. And finally, that she deserves a nice guy.