Final answer:
In literature, characters often compare sex or romantic interactions to other experiences or concepts to explore the complexities of human relationships and emotions.
Step-by-step explanation:
In the given passage, there are multiple instances where characters compare sex or romantic interactions to other experiences or concepts. For example, in the passage 'Clark compares sex with Jan to what?', the comparison being made is not explicitly stated, but it can be inferred that Clark is comparing sex with Jan to something else, possibly to emphasize the importance or significance of the act. Comparisons like these are often used in literature to explore the complexities of human relationships and emotions.