[BlazingArizona]

What if you do marry, and are sexually compatible... later something terrible happens, and one of you loses the ability to have sexual intercourse. Is this reason enough to leave the marriage? Is sex a large part of marriage, or a meaningful part?

Precisely why you need to try out all parts of the marriage experience first (okay, short of actually having children, I suppose). That way, you know how important sex is to you.

[Pan_Yans Wife]

I disagree. How heartbroken would you be to learn that the love of your life dumped YOU, because you couldn't perform due to cancer, MS, etc? How very sad. I would think that the love for your spouse would trump any sexual experience, and that you will love them while they suffered through a debilitating disease... and you should be able to ask the same of your spouse. This is a MARRIAGE, that is bound not only in legal terms but by the heart... otherwise why get married?