Pris proceeded with the training, touching various points on Jeff's second body's right arm, then his legs, his torso, then his face. "Are those starting to seem more familiar?"
"A bit," said Jeff. "It all still seems so strange."
"Now let's try a few bits I skipped over," she said. She touched his second body's balls, then gently cupped them in her hand. He moaned a bit. "It's a good sign that those are sensitive." She let go of his balls, and touched his left nipple, then his right. "Feel those," she asked, and he nodded. She touched his second body's penis, and saw him shiver briefly. She stroked it gently, and it started to erect. "Autonomic response is good," she said. Then, taking him completely by surprise, she climbed atop his second body, straddled him, guided his penis into her pussy, and started riding him.
He moaned, loudly. "I didn't expect you to cover that until the advanced class," he said.
"Thanks to the small class size," she replied, smiling, "the instructor can provide more individualized instruction, directly tailored to the student's demonstrated skill level."
"That feels amazing! Just like mine, but it feels like it's in a different location."
"It's not 'just like yours', she said, "it _is_ yours. You have to stop thinking of your second body as being something separate from you." She sped up her motions, and saw that his first body's cock was fully erect, and he was stroking it. "Hands off the first penis!" she ordered. "This class is about your second body only!" Reluctantly he removed his hand. She grabbed his second body's left hand, and moved it onto her right breast. "Feel that?" she asked, and saw him nod. Can you squeeze it?" she asked. She continued to hold his hand in place on her breast for several seconds, but he wasn't able to squeeze it. "Not to worry. We'll come back to that later."
As she continued riding his second body faster and harder, his first body moaned louder, and a small moan escaped his second body as well. "That's good," she said. "Try to moan more with your second body, and less with your first." He tried, and the second body did moan more. Suddenly she felt him ejaculate, and saw that his first body did so as well.
"Sorry, I just couldn't hold it any more," he apologized. "That awesome sensation, somewhere I've never felt it before..."
"You did fine," Pris said, "for a first time. With practice, you'll get better control, and learn to control your bodies separately."
"Please let me rest for a bit, before we continue my training."
"Sure," she said, getting up off him, "take five."
"I'm going to get something to drink," he said. "Can I get you anything?"
"I'm fine," Pris said.
"Thanks for asking," Rachel said. Her body appeared to be back to normal, albeit with the enlarged breasts.
Jeff headed downstairs.