Well, in literature, discreet sex stories can be acceptable in certain cases. If they are used to convey important aspects of a character's development, such as a character's struggle with their own desires or how a relationship changes due to sexual tension. But it has to be written in a way that is in line with the overall tone and purpose of the work. For instance, in a coming - of - age story, a discreet mention of a character's first sexual experience might be used to show their growth and transition into adulthood. But it should not overshadow the other important elements of the story like the character's self - discovery, family relationships, and friendships.
Yes, they can be acceptable in literature. However, it's a fine line. If it serves a greater purpose like exploring social taboos, power dynamics within relationships, or the psychological impact of sexual experiences on individuals, then it can be considered appropriate. For example, some works of literature might use discreet sex stories to highlight the different attitudes towards sex in different cultures or historical periods. But when it's just about titillation or being overly graphic, it's not acceptable in the realm of good literature.