Roger, 85, married Jenny, a lovely 25 year old.
Since her new husband is so old, Jenny decides that after their wedding she and Roger should have separate bedrooms, because she is concerned that her new but aged husband may over-exert himself if they spend the entire night together.
After the wedding festivities Jenny prepares herself for bed and the expected knock on the door. Sure enough the knock comes, the door opens and there is Roger, her 85 year old groom, ready for action. They unite as one. All goes well, Roger takes leave of his bride, and she prepares to go to sleep.