Do you know anyone that is obsessed with a media star?

I personally can see no reason for it. That’s why I am asking.

I have a friend who is for example obsessed with Madonna. This lasted his entire 38 years on this earth. He can recite all the words of all her songs, has most photo’s ever published and some not. He did eventually work close to her recently. But that is not the point.

What makes a person invest so much time and energy into another person? Who by all accounts they may never meet. Not in a real way at least. What is your experience of this? Do you know someone like this? How did it effect your life?