No. Such content is completely unacceptable in literature as it involves immoral and inappropriate themes, especially when it comes to the improper relationship between an old man and a teen.
There could be a story where a teen sucks at understanding the old man's tales from the past. The old man tries to share his war experiences or how things were in his youth, like walking miles to school in the snow. The teen just can't seem to relate at first. However, as the old man keeps telling these stories, the teen gradually starts to appreciate the different era the old man grew up in.
Sharing such stories is completely inappropriate and unethical. Any form of sexual relationship between an older man and a teen is not only illegal in most places but also a serious violation of a young person's rights and well - being.
One possible story could be that an old man witnesses the carefree and energetic behavior of teen swingers in a park. He might be reminiscing about his own youth and the simple joys of swinging. He could then approach the teens and start sharing his own childhood memories related to swinging, like how he used to compete with his friends to see who could swing the highest.
No. In most countries and regions, having sexual relations with a 14 - year - old is illegal because 14 - year - olds are considered minors and lack the legal capacity to consent to sexual activities.
They can share knowledge. For example, the old man might have a lot of life experience about various things like fishing or carpentry which he can teach the teen girl and boy. The teens, in turn, can share new technology or new trends with the old man.