Well, that's a strange combination. Sex and water could potentially be related in some adult-themed comics, but avatar and the other elements don't have an obvious connection. It's a really odd mix.
Yes. The Avatar comics provide more depth and exploration of the world and characters. They've been well-received by fans who want to immerse themselves further in the Avatar world.
No, Avatar is not a comic book. It originated as a highly successful animated film and later expanded into various related media, but not in the form of a traditional comic book.