Whenever this type of discussion comes up, I always say that I will never mind taking care of my wife's parents if they need me to. After all they will be her parents just like I have mine. (I am not married, so using future tense). You would be surprised to hear that my friends (girls and guys alike) don't believe me and think I am joking. I have had women who are in their late 30s (so exactly in the age when their parents need support) argue with me on this point. In their opinion, I don't know what I am talking about, and will not care about anyone once I get married.
TL;DR, People, even daughters laugh at you when you promise to take care of their parents equally as your own.
So when I describe my parents take on dowry (i.e. no dowry, we want a daughter, not a daughter in law etc), people think I am joking.
(I don't remember why I am writing this anymore)