There is a point in your life that you don't want to acknowledge.
You probably won't even notice it when it happens.
You'll be smiling and happy and jovial.
But you will look back upon it, on your deathbed, as The End.
The last time you saw your best friend.
It was assumed you would see each other again.
Why wouldn't you see him again?
You enjoy each other's company, and you will both live forever.
But then one day, he is gone.
And he won't be coming back.
There is a last day, there is a last time, for everything. You just don't realize it when it happens.
The last time you have sex.
The last time you get a hug.
The last time you go to the dentist.
And it never happens again.
And you won't need teeth where you are going.