If both men and women claim to be S, the stronger one is S and the weaker one is M. What happens to a man who says S when he has to play as an M man? At first it was not accepted, but the man falls to M by a super intense filthy act. Nipple torture, footjob, sizing. After receiving various humiliations, he finally begs for ejaculation and realizes that he has become an M man.
