One of the most popular debates among One Piece fans is whether Luffy is only attracted to Boa Hancock or if he has feelings for other characters in the series. While Luffy has been shown to be uninterested in romance, there are certain instances where he seems to show a special affection for the Warlord of the Sea, Boa Hancock.
Firstly, it's worth noting that Luffy has not shown any romantic interest in any other female character in the series. Although he has interacted with several female characters, including Nami, Robin, and Vivi, he has never shown any signs of attraction towards them. On the other hand, Luffy has shown a significant amount of interest in Boa Hancock, both in the anime and manga.
In the Amazon Lily arc, Luffy was the first man to ever set foot on the island, which is populated solely by women. Despite being surrounded by beautiful women, Luffy was uninterested in them, only showing admiration for Boa Hancock. He even went as far as to ask her to join his crew, indicating that he values her company above all others.
Moreover, Luffy has shown a willingness to go to great lengths to protect Boa Hancock. In the Marineford War arc, he went up against Admiral Akainu to save her from harm. This action was not only brave but also showed how much he cares about her safety and well-being.
It's also worth noting that Boa Hancock has shown romantic interest in Luffy. She has kissed him twice, and her love for him is evident in her actions and dialogue. However, it's unclear if Luffy reciprocates her feelings or if he is simply grateful for her help and company.
In conclusion, while Luffy's feelings towards Boa Hancock are not explicitly stated, there is evidence to suggest that he may be attracted to her. His lack of interest in other female characters and his willingness to protect and spend time with Boa Hancock indicate a certain level of affection towards her. However, it's ultimately up to interpretation whether or not Luffy is romantically interested in her.