He: "Darling, do you remember, when we were young..."
She: "Yes, Sweetheart, I do, I do..."
She: "...we were all over the places, traveled a lot, met people, had parties. Now we stuck to this bench..."
He: "He-he-he, you are funny... No, what I meant to say, that when we were young and decided to spend the rest of our lives together, we made a promise to each other. Do you remember what it was?"
She: "I do, Sweetheart, I do.... We promised each other to be stuck to this bench ever forever, didn't we? Am I correct?"
He: "Hmmm, kinda... We promised each other to be together ever forever, till each of us reaches 108 years, and we made that promise true. Happy Birthday, Darling! Happy 108!
... and they were sitting and talking about what a wonderful life they have been living together, side by side, till each of them has reached 108.