Well, in regular science - fiction books, the main goal is often to create a believable and exciting science - based world. Smutty science - fiction books, on the other hand, might use the science - fiction backdrop to tell a story that has a significant amount of sexual content. For instance, in a regular sci - fi book, the focus could be on a group of scientists trying to prevent an asteroid from hitting Earth. In a smutty sci - fi book, it could be about a love triangle on a space station that involves a lot of sexual tension and activity, and the science - fiction elements are just a setting for this more salacious story.
Smutty science fiction books often include more sexual or adult - themed content. Regular science - fiction books focus more on scientific concepts, technological advancements, and space exploration. For example, a typical science - fiction book might be about colonizing Mars, while a smutty one could be about a sexual relationship on a spaceship.