No. Watching any such stories related to teens in a sexual context is completely unethical. Teens are minors and should be protected from any form of sexual exploitation or inappropriate observation, whether in real life or in the form of stories.
Definitely not. Sharing something like that is not only improper but also may make others feel very uncomfortable. It violates the boundaries of acceptable behavior and can be considered a form of sexual harassment in some cases.
No, it is not ethical. Masturbating to a friend's erotic story violates boundaries of respect and privacy in a friendship. Such behavior can make the friend feel violated and uncomfortable if they were to find out. It also objectifies the friend in an inappropriate way.
No, it is completely inappropriate. Masturbation is a very private act, and watching someone else do it without their explicit and full consent is a serious violation of privacy and personal boundaries.
No, it is completely inappropriate. Such activities are private and personal, and sharing or witnessing them without consent is a serious violation of privacy and ethics.
Psychologically, it may cause confusion. Since masturbation is a private matter, seeing it in a story in a way that is made for 'watching' can make a person question the boundaries of privacy and appropriate sexual exposure. It could also arouse unnecessary sexual curiosity in an improper way, rather than promoting healthy sexual exploration based on mutual respect and understanding.
It's not okay. Masturbating while watching any TV show is not a proper or respectful way to engage with the content. American Horror Story is no exception.
Definitely not. Everyone has the right to their own privacy, and these kinds of stories are extremely private. If you are exposed to such without permission, it's wrong and unethical behavior.
This is an extremely abnormal and inappropriate situation in most social and ethical norms. Masturbation is a very private act, and involving a best friend in such a way goes against the boundaries of healthy relationships and propriety.