Comic paper thickness usually ranges from 60 to 150 gsm. It depends on the quality and purpose of the comic. Thicker paper is often used for special editions or to give a more substantial feel.
The thickness of a comic book really depends. It could be as thin as 20 or 30 pages for a single issue, or it could be a collected volume that's several hundred pages thick. Factors like the story length and format play a role.
Comic gutters are typically not very thick. They're often around 1/8 inch to give a good visual break between the comic panels without making the page look cluttered.
You should not aim to create hentai comics. They are not in line with proper and ethical creative pursuits. Focus on more positive and legal forms of artistic expression.
Creating a hentai comic isn't easy. You need to be creative in coming up with unique scenarios and have the ability to depict them visually. It helps to study other similar comics for inspiration and keep practicing your drawing techniques.