This mistress knew her slave was not going to have time to date and she was mindful of his sex life so she trained him to masturbate. He learned pretty fast but she did better than just teach him and she would once in a while give him jerk off instructions with which he used to cum. It was a lot of fun for the mistress and she loved it.
These mistresses were in a naughty mood and they did not hesitate to use it to dominate. They wanted to have some fun at the expense of these guys and so they went ahead to use their jerk off instructions fetish to dominate the guys. The guys thought it was going to be a crazy orgy but nothing of the sort happened. They were made to jerk off to the mistresses' instructions.