Mistress BlackDiamoond loves to use sissification to get her revenge because she knows how cruel it is and how tough it is for her to do whatever she makes those guys do. So she used a huge strapon and she made this guy swallow it. He had to have it down his throat and it was painful as well as humiliating as he was a straight guy. He, however, learned his lesson.
When mistress BlackDiamoond realized that this guy was a loser and he had sissy tendencies, she chose to sissify him and to teach him a lesson. She wanted it to be a lesson he would never forget so she tied him cruelly and she made him bend over before she fucked him in the ass like he had never been fucked before. He cried in pain but he learned his lesson.