Friend A: Did you know that they found out that elderly people remember the faces of people they met when they were younger far better than those they meet at a later stage in life? It's a scary though.
Friend B: What's so scary about that?
A: When you have grandchildren and find that you remember my face and you can't recognise your grandkids, why don't you come up to me and tell me whether that's scary?

Heh.