Why are marriages so frail these days?

Why are marriages so frail these days?

I have friends that got married not even three years ago divorcing. My sister's husband let me know he's been sleeping in the guest room for four months now - no yelling or arguing, just plain indifference. And supposedly I have to keep my month shut about this because she forbade him from discussing this with anyone and especially me.

He assured me there's no talk of divorce, but it doesn't look good.

Why are marriages so frail these days?
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