It is quite common to see people in India calling elderly people uncle and aunty. Though many wouldn't express openly, they may feel within themselves that they are caught up with age whenever someone calls them so. They feel like being called Anna and Akka.
Megastar who is almost nearing 70 said that he asked his grandchildren to call him Bhayya. Anasuya turned wild when netizens called her Aunty.
Coming to the point, there is a production partner in a banner who is nearing 50 years of age. But he makes the people around him call 'little brother'.
There is an upcoming hero who started his career as a child artiste. He calls this producer 'uncle' which is not going well with the latter.
The producer is worrying within himself instead of conveying his feelings to the young hero. Better to express the need than feeling frustrated whenever this hero comes to greet him.