The little piece of tape that connects a father and son

It's been at least 20 years, but that little piece of tape is still stuck just inside the top drawer of my desk.
It's brittle and yellowish now, but somehow it's still stuck there, right where I put it years ago, sometime after my oldest son went in for surgery on his wrist.
Because I'm a father, not a mother, I can't remember when it happened, nor do I recall all the specifics of it, like how old he was or how long the surgery lasted. But I do remember him going into the hospital that day.