Men and women can and do live together well. It is not gender specific as to why they don't do well when they don't. Even 2 women and 2 men can have problems living together. Their are issues of compatibility, deception, impatience etc that makes living together difficult. If you are talking about romantic relationships, then men and women fair better when they wait until they are older to get in serious relationships. Too young into romance and marriage creates problems due to immaturity. Also, men and women have a bad habit of hopping into the sack way too soon. You gotta be friends first. Gotta go out and talk to get to know one another. Women have this frame of mind that good sex cures all. It doesn't. Whenever things go wrong she thinks let me give him some sex to make him happy. But it's more than just that. You gotta be friends first and the romance and living together works out better.