Should elderly parents move in with their children once they can no longer live on their own?

I believe that is a conversation that should be had in every household. Some parents not want to impose the kind of care they will need on their own children and would rather be moved to a facility, but I think it should be a conversation that is had between the parents and the children and both parties should say what they feel about it. Also if the adult child is not willing or able to care for their parent that should be put out into the open as well , so proper arrangements can be made for when that time does come.