By sucking dick at the same time

"I think the only way for you to progress properly, Robin, is for you to suck your therapist cock while you rub your clit through your panties."

Dr. Clay pulled down his pants and boxers and let his already hard cock spring free. Robin obediently walked closer and dropped to his knees.

"Good, your natural feminine subservience dictates that your one desire is to make me cum with your mouth while you continue to feel the frustration of denial. What could be a more common, womanly experience than for a man to take his pleasure while leaving you wanting?"

Robin took Dr. Clay's dick into his mouth and started sliding it in and out of his wet mouth.

"You only need one hand to rub your clit, use your other one to cup my balls so you can feel how much heavier and more manly mine are."

While Robin did this, Dr. Clay reached down and pinched one of the sissy's nipples, earning a squeak of surprise and pain from him.

Then he reached around and grabbed the back of Robin's head to thrust deeper, forcing him to deep-throat. His eyes opened wide in shock and he started to make muffled gagging sounds whenever Dr. Clay thrust in.

"Remember, sex for you is always hottest when you're being used, abused, and humiliated for the pleasure of others. My total disregard for your comfort and pleasure is exactly what will make you crave more of this treatment."

Soon, Dr. Clay felt an orgasm building. He had to make a quick decision about where to cum.