It depends on the context. Sometimes getting wet could be part of a dramatic or comical scene and be okay, but in other cases, it might not fit the tone of the story.
Well, it's not a straightforward yes or no. It could be okay if it's part of a meaningful scene or serves a purpose in the story. But if it's random and doesn't add anything, it might not be so good.
It depends on the context and the specific manhwa. Some might have no issue with it, while others might consider it inappropriate or against the intended theme.
A 'wet dream fanfic' is a form of fan - created literature. Fanfic, short for fan fiction, is when fans write stories based on existing works, like movies, books, or TV shows. When it comes to 'wet dream fanfic', it could be that the writer is using the idea of wet dreams as a plot device. For example, it could be used to explore a character's hidden emotions or sexual awakening in the fictional universe. It's a rather niche area within fanfic writing.
I don't think Wet Dreamz is a true story. It could be a product of the author's creativity or a fictional construct designed to engage the audience in a particular way.