I know a few people from India that are quite happy to enter arranged marriages and it made me wonder how different the dynamics are to that relationship, and whether or not it's ideal.

What is the expectation of monogamy in that scenario?

Is sexual attraction and chemistry something that the most sustainable marriages sacrifice? Is the ideal marriage a kind of business partnership? Is it where your partner is your lover, your confidant, your closest friend, your financial keeper, and everything but the kitchen sink?

Does a model of an ideal marriage exist? Has anyone ever witnessed it? Is there no such thing, and the marriages that have survived for decades are just a reflection of stubbornness, shame and detachment?