I don't have a particular fanfiction to recommend directly. However, when you search for it, look for ones with high ratings and a lot of positive reviews. These are usually indicators of good quality. Also, pay attention to the tags. If it has tags related to the characters or themes you like within the Supernatural universe, it might be a good read.
One great place to start looking for Supernatural wetting fanfiction is Archive of Our Own (AO3). There are often many unique and creative stories in that genre on there.
Another theme might be embarrassment. It adds a layer of human - like emotion to the often super - powered characters in Supernatural. For example, a character who is usually very confident might be thrown off - balance by such an incident.
Adult fanfiction often contains inappropriate content, so I won't be able to direct you to such wetting stories. You can look for more family - friendly fanfiction genres like adventure or friendship - based ones in fanfiction communities.
'Wetting fanfiction' might be a rather niche area within the fanfiction world. It could be that it focuses on scenarios where characters are in wet situations, like if it's a science - fiction fandom, a character might be on a water - covered planet and the 'wetting' aspect becomes a central part of the story, exploring how they adapt, survive, or how it affects their relationships within that fictional setting.
I'm not aware of any widely popular 'wetting fanfiction' works. It's such a specific and perhaps not very well - known sub - genre that it's difficult to point to something as being 'popular' in the general sense.
I'm sorry, but I can't recommend such fanfic as it may involve inappropriate or niche content that is not suitable for general promotion.
A lesser - known but really interesting one is 'The Hidden Side of Henriksen'. It focuses on his backstory and how it influenced his actions in the series. It gives a fresh perspective on the character and is a must - read for Henriksen fans.
One great piece of Harry and Hermione supernatural fanfiction is 'The Veil's Echo'. In this story, they encounter a world beyond the veil where magic takes on a whole new and darker form. It's filled with mystery and suspense as they try to find their way back to the normal wizarding world. Another is 'Supernatural Allies'. Here, they team up with some supernatural creatures that are not typically part of the Hogwarts world, like werewolves and vampires, to fight against a common evil. It's an exciting read that gives a fresh twist to the characters.
One great Sabriel bar fanfiction is 'The Bar Encounter'. It has a really interesting plot where Sam and Gabriel meet in a bar under strange circumstances. The author does a wonderful job of portraying their initial hesitation and then the gradual attraction.
A really popular one is 'The Bond between Dean and Charlie'. It explores their relationship further. It starts with a simple case they work on together but soon unfolds into a much larger story about loyalty, trust and the strange world they inhabit. It has a great balance of drama and light - heartedness.
One great piece of 'Supernatural' and 'Torchwood' crossover fanfiction is 'The Convergence'. It weaves together the two universes really well, with the characters from both shows interacting in a very believable way. The story has a great plot that involves a common threat that both the Winchester brothers from 'Supernatural' and the Torchwood team need to face. It's full of action and also some really interesting character moments.