I may have mentioned before that I don't know of too many happy marriages, but the ones I do know of invariably have a strong leader and able provider doing a job he loves as the husband, and a home-loving nurturer as the wife (and they have three or four kids). The majority of the unhappy marriages I know of have both partners working, and the man unable to satisfy the woman mentally or sexually (usually because he is so damn overworked, but in one case he's just an ass).
Sometimes I think of it like this. A man and a woman as a couple are like an egg. The man is the outer shell and the woman is the yolk inside. The yolk needs the outer shell to keep it safe and to keep it contained in the proper shape for life to develop. But without the yolk, the shell has no purpose. And the hard shell gains some strength to absorb blows thanks to the yielding and soft yolk underneath. Without it, the shell would shatter very easily. Hokey enough for you?