I'm not sure if there is a specific fanfic with that exact title. Fanfic availability can vary greatly depending on the fandom platforms and the creativity of the writers. You might need to search on popular fanfic websites like Archive of Our Own or Fanfiction.net to see if such a story exists.
No. Anal sex in public is not legal in most places. Public sexual activities are considered inappropriate and violate public decency laws. These laws are in place to maintain a proper and respectful public environment.
There is also 'The BFG' (Big Friendly Giant) by Roald Dahl. It's a children's book about a friendly giant who befriends a little girl. It's full of charm and adventure.
It's inappropriate because it takes a beloved and positive character like Naruto and turns him into something vulgar and unrecognizable. The Naruto story is about so many great things like the ninja world, the different clans, and the power of believing in oneself. Adding such adult - like and inappropriate content is like tainting the pure image of Naruto. It also may make some fans uncomfortable or even drive them away from the fan community if such content becomes prevalent.
I haven't come across a 'Giant Dick Killua x Gon Fanfic'. Fanfics usually range from various genres like adventure, friendship - enhancing, or alternate universe stories. A title like this seems rather out of the ordinary and not in line with the general positive and respectful nature of most fan - created works. So, it's likely not a common or widely available one.
This is a very personal and subjective topic that can vary greatly from woman to woman. Different individuals have different experiences and feelings about it.
Sharing this kind of story is not okay. It violates the privacy and respect that should be given to individuals. Moreover, it goes against the norms of proper public and social communication which should be family - friendly and inclusive of all values.