This is based on a similar story. Involving milk. The first time John came over to our house was to work on a project in high school. So there’s a group of us and my mom in the living room, and John just walks right in through the front door, goes to the fridge, and pours himself a glass of milk as we all stare on in amazement.
“Hey John… want some milk?”
“No thanks. I got some.”
My mom STILL talks about this story.