Bend over the desk

You quickly strip for him and head to his desk. Before you have time to bend over it he grabs you firmly and wraps one of his large hands around your stiff little cock.

"Small, no wonder you're so submissive. This little thing won't ever please anyone, your body knows its best purpose is to be used by others" He whispers into your ear. You blush as he strokes your dick with two fingers. "Don't be ashamed, it's simple biology. Boys with little cocks are born to serve, this is what you're made for." He continues, guiding you to the desk. He bends you over it, placing you hands next to your head, and grinds his hard cock against your soft, eager ass.

"Don't you dare touch your cock. You don't need that thing anymore, sissies like you just need a good ass fuck to cum. If you touch yourself, the therapy won't work." He speaks into your ear, pinning you down onto the desk.

"I hope, for your sake, that you got my cock wet enough. We don't have time for lube" He says as he aligns his cockhead with your sissy hole, and thrusts.