I would have to agree with your statement "A man cannot achieve fulfillment in his marriage unless his wife is sexually fulfilled as well." and it definitely is true vice versa. If something is wrong in a relationship, whatever it is, like you said it tends to spillover into other aspects and can take some time to repair the damage that is done.

Of course it doesn't even have to be due to sexual fulfillment, it could be a lack of intimacy, attention, ect. As for if I could go without sexual intercourse and still preserve a healthy relationship...I think it is possible, but when I am in a relationship with someone, I often link intimacy and sexual relations together. Haha as corny as this sounds, when I do care for someone, it isn't sex to me, it truly is making love (although you can still fuck, I think that is the beauty of it...you can range from slow, smoldering passiong to just wild, animalistic, primal fucking, all depending on the mood).

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"And as we all play parts of tomorrow, some ways will work and other ways we'll play. And I know we can't all stay here forever, so I'll write, my words on the face of today...and then they'll paint it" - Shannon Hoon