The embarrassing nickname your grandpa uses is proof somebody’s been loving you since you were tiny.

That name is a receipt from a time you cannot remember. It was made when you were very small, by somebody who has gone on using it through every version of you since, which is a record of unbroken attention. The embarrassment is about the audience rather than the name.

Let him use it, including in front of your friends, and resist correcting him this year. If you get the chance, ask when he started saying it and what you were doing at the time. One day the sound of it will be the thing you would give a lot to hear again.