Definitely not. In any society, there are moral and ethical norms. Seducing a minor (assuming the son is a minor) is illegal in many places. Even if the son is an adult, it is still wrong as it goes against the principles of proper relationships and the trust within a friendship.
This is completely unethical behavior. Seducing someone's son is inappropriate and can cause great harm to many people, including the son, the friend, and yourself. You should firmly decline such a wrong suggestion and distance yourself from this unethical situation.
One benefit is that it can expand his vocabulary. As he watches the story, he'll hear new words and phrases, which is great for his language development. Also, it can stimulate his imagination. The story's plot and characters can inspire him to create his own little worlds in his mind. Moreover, it might help him learn about different values and morals through the story's message.
No, it is completely inappropriate. Such behavior involves sexual and private matters that should not be done in the presence of a friend. It violates social norms and the boundaries of a healthy friendship.
The son had a friend who was new in school. The son noticed that his friend was having trouble making friends. So, he introduced his friend to all his other buddies and included him in all their games. They became best friends, and together they joined the school's science club. They worked on projects together and won an award for their innovative idea. Their friendship was based on kindness and mutual support.
It's not ethical at all. Marriage is a bond between two people, and for a friend to offer or for someone to accept such a situation goes against the trust and commitment that marriage represents. It also shows a lack of respect for the institution of marriage and the feelings of all parties.