Strange joke composition in the airport

Humorous joke: Little sister, you have an airport at a young age.

I was born with small breasts. Once my sister teased me and said, "Are you so rich at an early age?" I said, "That's money. I'm as poor as a ghost. I can't even afford a dress!" " "Then she said," you have an airport at a young age! "I ... and then she said, Oh, listen to your chest singing. I asked, "What song are you singing? "She said," I don't want to grow up, I don't want to grow up … "I was speechless …