I'm not aware of any such fanfiction. This concept seems rather unusual and not in line with the typical relationship dynamics in the Naruto series. Fanfiction usually focuses on more common themes like their friendship, rivalry, or adventures together.
There may be some fan - made stories that touch on family - friendly themes related to nurturing in the 'Naruto' universe. However, breastfeeding - specific fanfiction is not a very common or mainstream concept in the general 'Naruto' fanfiction pool. Most of the fanfiction focuses on battles, character relationships, and adventures rather than this particular topic.
I'm not sure if there are extremely popular ones specifically focused on breastfeeding in the Naruto fanfiction world. However, there are likely some niche ones that fans of the genre might enjoy. Fanfiction is a vast and diverse space, and these types of stories are often more of a personal exploration by the author.
One possible interpretation could be a fanfiction that focuses on the nurturing aspect of motherhood in the 'Naruto' world. Maybe it's about a female character like Hinata taking care of her baby in a traditional nurturing way, which could include breastfeeding. It could also be about the bond that forms between a mother and a child through this act of caregiving.
This concept is quite far - fetched. Naruto and Sasuke are both male characters, and their relationship is defined by their ninja skills, their emotional bonds, and their roles in the story. Breastfeeding has no place in their relationship as it is presented in the original work. It would be a very abnormal and unappealing take on their characters.
One interesting breastfeeding Naruto fanfiction could be one where Naruto's mother, Kushina, has a series of flashbacks while breastfeeding him as a baby. These flashbacks could reveal secrets about the Uzumaki clan. Another could be a what - if scenario where Naruto is found and cared for by a different female character who breastfeeds him in a post - war scenario where he's injured and needs nurturing.
Adult breastfeeding fanfiction refers to a type of fan - created stories. It focuses on the concept of breastfeeding in an adult context, which can be part of a particular fictional universe or relationship within fanfiction. But this kind of content can be seen as inappropriate or against social norms in many cultures.
No, it's not appropriate. The 'Harry Potter' series is mainly about magic, friendship, and fighting against evil. Hermione breastfeeding is a very private and adult - like situation that doesn't fit the general tone of the series. Fanfiction should generally stay within the boundaries of the original work's themes and values.
There may or may not be such a fanfiction. It's not something you would typically expect in the world of fanfiction related to the Harry Potter series. Fanfiction writers usually draw inspiration from the existing characters, magic, and storylines to create more believable and engaging stories. This concept seems so far - fetched that it's less likely to be a widespread or well - known piece of fanfiction.
I haven't come across any Peter Parker fanfiction with such a strange and inappropriate topic as 'breastfeeding lemon'. Fanfiction typically adheres to certain norms and this goes against what is considered acceptable content in the fan community. So, in short, I don't think there is.