How Do You Identify A "Happily Married" Couple?

 
Dear readers, considering the fact that there are so many challenges rocking marriages these days. And the fact that couples tend to cover up their differences by putting up a smile and engaging in public displays of affection (just like the Obama selfie saga, Lamar Odom, Babyface etc) even during trying times, I'd really want to know the criteria you use for tagging couples ''happily married"!
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