I found theme of KANK absolutely abstract and absurd, SRK and Rani had wonderful spouse. Priety who shouldered the responsibility of the family, and Abhishek who was in deep love with Rani, and was a caring husband. I failed to understand what made drifted these two stupid people apart from their spouse's and falling for extra marital fling. It appeared whimsical,cinical and BS to me.
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That not the question of viewers choice that a concept of story writer, majority of stories comes and inspired from society, its might not happening in our culture at present but its quite common in western society,