Vignesh Shivan‘s Kaathuvaakula Rendu Kaadhal, starring Vijay Sethupathi, Nayanthara, and Samantha, thinks it is making a strong case for polyamory.
We like day and night. We like biryani and curd rice. We like Ajith and Vijay. As humans, we enjoy and thrive in plurality. When that is the case, why is polyamoury taboo, and why is monogamy the rule?
However, the case the film actually makes is for patriarchy and sexism. Sure, one can have multiple partners if everyone involved knows about it, and agrees to be part of it. But in our society, and by extension Kaathuvaakula Rendu Kaadhal, this is just reserved for the man.