Sade is a French aristocrat, and there are many descriptions of sexual abuse in his works, so people later call people who like to cause pain or enjoy sexual abuse "sadists". On the other hand, Massock is an Austrian novelist. His works describe passive sadism, so passive sadism is called "Massock phenomenon", that is, masochism.
In ACG culture, S and M are usually used to express the sexual preference of characters or the behavioral characteristics of role-playing. Among them, the S attribute usually refers to the character who likes to cause pain or dominate others, while the M attribute refers to the character who likes to be controlled or forced to obey. These two attributes are often used to increase the tension between characters or to provide more drama for stories.
It should be noted that s and m do not represent all people's sexual preferences or behavioral characteristics, and should not be used to belittle or discriminate against others. We should respect everyone's sexual orientation and personal preferences and avoid associating certain attributes with specific behaviors or people.