These topics are always a bit uncomfortable to talk about, but as the oldest of four siblings, I've had this talk with both of my parents. We are lucky that they both have been successful in their lives and have significant retirement plans and investments. They are certainly more well off than my brother and I ever will be. The jury is still out for our two sisters.
What I thought was quite interesting in having these discussions is that both of them already have pre-paid for their funeral arrangements. They have their land plots picked out, headstone, casket, service, all the "last details." How considerate of them to take the financial and logistical strain out of a sad day.
I can only imagine how tough it was on them with their parents that they would go out of their way to prepay for an end-of-life plan. Give it up to late-stage capitalism though. It's thought of everything!