Last night I was watching one of my favourite musicals - Fiddler on the roof . It was probably on the 3rd time I watched the movie and it has probably been at least 5 years . So I ' m watching this great film and the papa starts to sing " If I were a wealthy man ba da ba da ba ... " and I sat there having a total deja vu . Why do I know this song ?

Question: Why does this person watch the same movie again and again ?
Answer: The feeling of nostalgia , the movie brings back memories .They have a very bad memory and think it is new each time .It is the only film available in the musical category .With each viewing they see new hidden details .