Masturbating in public is completely unacceptable behavior. It violates public decency and can make others extremely uncomfortable. In public areas, we should abide by social norms and respect the rights and feelings of others.
No, they are not appropriate to share. Masturbation is a very private matter. Sharing such stories about friends violates privacy and is also disrespectful to others.
One of the horror stories could be getting lost during a jungle guided tour. The guide might have miscalculated the route, and as night falls, strange noises start to come from all around. Another could be a haunted house tour where people actually experience paranormal activities like seeing apparitions or objects moving on their own. And there was this one tour in an old abandoned mine where the group got trapped due to a sudden cave - in and had to wait in the dark, not knowing if they'd be rescued.
Yes, I once went on a guided tour of an old, derelict mansion. As we walked through the dark hallways, there were cold spots everywhere. Suddenly, a door slammed shut on its own, and we could hear faint whispering. It was really scary.
You can be clear about your boundaries. Let your friends know that you are not interested in such topics. If someone starts to tell such a story, firmly interrupt and change the topic.
Adventure stories are also very interesting. Tales of exploring unknown places, facing challenges and overcoming difficulties can be really inspiring. For instance, stories of mountain climbers conquering high peaks.
No. Reading or writing such fanfiction that involves non - consensual and inappropriate behavior is not acceptable. Fanfiction should generally be based on positive, consensual and respectful themes.