We have an odd culture when it comes to marriage. We agree when we get married that this is for life. Isn't that at the root of what marriage means? If not, then when is the difference between marriage and dating? I digress. "In sickness and health, for richer or poorer, for better or worse." Unless I decide that you have changed and I don't like who the new you is. Then it is acceptable for me to divorce you. Trust me, I myself have contemplated that avenue many a time, and these issues, thoughts, concerns, are ones that I struggle with all of the time. What did I mean when I said I do? I do, for now? I do, until you really upset me? I do, until you age, and grow, and are no longer the same person that I said I do to?
To answer your questions directly Moose, I don't think that even if our interests do change because of dressing that that singularity really justifies divorce. There is no bait and switch in marriage, or really it is all a bait and switch. None of us ever remains exactly the same. We can all say that I said "I do" to that person at that time, but that person at that time is lost to history. We all change over time.