What if a boy calls you sister?

Imagine you're walking down the street, minding your own business, when suddenly a young boy comes up to you and calls you "sister." What would be your immediate reaction? Would you feel surprised, confused, or even a bit offended? Would you try to correct him and explain that you're not actually his sister? Or would you simply smile and play along, seeing it as a harmless mistake? It's an interesting scenario that raises questions about the nature of familial relationships and the way we perceive and identify with others. What do you think it means for someone to call you sister, and how do you think it should be handled?