His mouth

You grip Corey's chin with a gloved hand, and open his mouth while turning on the magnifying light. Examining the young teen's mouth, you see a few fillings but it looks healthy. Corey had his tonsils still and his throat pulsed with every breath he took. You play with his tongue a bit, then see how many fingers you can fit in his mouth.

Which was three.

You grab a dildo that was marked like a ruler, "Time to see how deep your throat is..." You say.

Slowly it was inserted it into Corey's mouth. He coughed as you pushed it down bit by bit; but Corey's throat began to widen and adjust. You stopped when he hit the fifth mark. Satisfied with this for now, you strip and reveal you our unit. Raising the table up a bit, so the teen was slightly sitting up, you stand over Corey and stroke your unit with one hand, and open his mouth with the other.

"Now say 'ah', Corey."

"...ahhh..."

You insert your unit into his mouth, and then began to fuck his oral cavity. After a minute you begin to speed up, making Corey give you BJ before making him take your unit into his throat.

He gags for a second, but then relaxes and let's you ram his throat until you cum...shooting deep into his stomach.

You pull out. "You'll have to practice Deep Throating Corey. But only with me."

"Yes...Doc."

You then pull out the stirrups, and place Corey's feet in them before seeing his anus. Putting on a fresh pair of gloves, you insert a finger...loosening up the teen's muscles. Then add another, and another until you have four fingers inside.

That done, you use a spectrum to open him up and the endoscope to check his insides. When I looked good, you removed them.

"Get ready Corey," You tell the teen. "You'll enjoy this...even if you won't remember."

With that, you push your Unit into Corey's anus. He let out a hoarse gasp, but stayed on the table. Bit by bit, you soon have your unit all inside him. You then began to move, going in and out of the teen. As your length was 11' inches; you hit his rectum every time.

Corey began to moan in pleasure. "Mmm.....yes....keep going....ah, there....harder..."

"With pleasure." You say, ramming him over and over. Soon you cum deep into his bowls, your patient cums as well all over his stomach, then you pull out. Once all cleaned up and you redress yourself and Corey, you take out the light again and make Corey follow it. "Now then..."