Where’s the booger?

I was walking in the park when I saw my friend and her 5 yr old son sitting on a bench. I walked over to them and the 5 year old started pointing at me, I said, “if you keep pointing I'll eat your fingers." He kept pointing, so I stuck his fingers in my mouth and pretended to eat them. He then started crying. I looked at him and said don't worry I'm not really gonna eat your fingers. He replied, "I know that but where’s my booger?"