Dentist's Sputum

I was in a library with my little sister. We were sitting down on the floor and looking at some books. There was a little baby boy behind us, and he was also looking at some books. Our grandma approached us with a clear bottle in her hand. The label of the bottle said "DENTIST'S SPUTUM." It looked like it. She was very happy to see us and told us about the dentist's sputum. Pointing at her healthy black hair and the bottle of the dentist's sputum, she said that it was the sputum that made her hair so healthy. She was happy that she looked a lot younger than how old she was. She told us to use it to any body part where we want some help with. Hair, nails, chest, eyelashes..... After explaining to us about the miracle of the dentist sputum, she gave us the bottle and left us in the library.