Well, first of all, it's completely out of character for Luffy. He is a character full of innocence and is mainly focused on his adventures and his crew. Such a fanfiction misrepresents his personality.
There may be some very niche and inappropriate fan creations out there. However, the mainstream 'One Piece' fandom should focus on the real values of the story, like the bonds between the characters, the exploration of the Grand Line, and the various challenges they face. This kind of inappropriate fanfiction is not worthy of promotion.
If it involves sex - related talk, then it's not appropriate as it goes against the family - friendly nature of the original Luffy character and the One Piece series in general.
It's not appropriate at all. These are characters from a well - known story, and creating such sexual fanfiction objectifies the characters and violates the ethical boundaries. We should focus on positive and respectful interpretations of the characters, such as their adventures and friendships.
A cool plot would be when the Whitebeard Pirates meet Luffy while he's on a quest to find a rare Devil Fruit. They too are interested in that Devil Fruit for some reason. Instead of fighting over it, they decide to team up. Luffy's unique perspective and the Whitebeard Pirates' experience combine to create an epic journey filled with challenges and new discoveries.
In fanfiction, when the Whitebeard Pirates meet Luffy, they might initially be cautious. Luffy's reputation as a rising star in the pirate world could make them curious. Maybe they would test his strength. For example, some might engage in a friendly sparring match with him to see what he's made of.
They might have an epic battle to test Luffy's growth. Shanks could see how much stronger Luffy has become and be proud. Maybe Luffy will show off his new Haki abilities.
In fanfiction, when Sabo and Luffy meet again, they might have an emotional reunion. They could share stories of their adventures since they last saw each other. Sabo might show off his new skills or powers, and Luffy would be excited to see his brother again. They could also plan new adventures together, vowing to face any challenges as a team.
No. Such a topic is not appropriate as it objectifies women and often involves non - consensual or unethical implications in the context of sexual relationships. It goes against the principles of respect and equality for all genders.