Now that Ty had a second big cock again, he started masturbating. As he'd told Lisa before, he generally didn't enjoy it as much as sex with her. Except that, when she was his cock, it actually was sex with her. Physically, it just felt like jerking off, though with two giant cocks, even that was better than usual. But knowing that she was in there, experiencing it as her whole existence? That was pretty amazing.
He felt reasonably sated after he came, but he was still erect, and knowing how much Lisa enjoyed this. Well, she had said it was the best transformation she'd experienced, so he jerked off again. He wss definitely feeling very tired, so he went to the bathroom, took a piss (again practicing aiming with two cocks), and took a hot shower. I wish LIsa was here in the shower with me, he thought, then realizing that she wss, gave her a bit of extra attention. Finally, he wished the room clean, and went to bed.
Hours later, he woke up, refreshed, and with a double case of morning wood. I may as well take care of that, he thought. And her. He jerked off both cocks again, and took another hot shower. This time, he thought, I really want her here with me. In human form. He merged his two cocks back into one, and transformed Lisa back into human form, right there in the shower.
"Mmmm, good morning, Ty!" she said. "That was great! I like merging back, having the experiences of being _two_ of your cocks."
"And how did it feel 'yesterday', when the two of you were both my cock, and your own body?"
Lisa was startled."Oooh, I didn't realize that I have two sets of memories from that, until you just brought it up! Wait, so that was a real split I felt? You sly dog! And I do have the memories, of fucking both in human form, and as your cock. Ooh, feeling sex as your cock with an actual vagina, that was even better than your masturbation! At the time, as your cock, I didn't realize that you were fucking... my human body! Wow!"
"And what about the second time we had sex yesterday?" Ty asked her.
"With my cock, and your pussy? Yes, that was great too. Wait! My other memory of that! It felt much different as your cock, that time."
"Because you weren't my cock that time," Ty said.
She briefly looked puzzled, then smiled. "Oh! As your pussy! Wow! Yes, that was very nice!"
"So," she asked, "why did you wait so long to merge me back?"
"Well, at first it was just to surprise you with getting to experience the same sex both as my cock fucking your pussy, and as yourself, but then I wanted you to experience it gender-swapped. And you never told me before how you felt when I used you as my cock to urinate, but when I spoke to Cock before, in your mind, I got the impression that Cock also enjoyed pissing and sleeping, so I wanted you to experience those too."
"When I was your cock, without the mental changes, pissing was OK, but nothing to write home about. But with the mental change, so that I was entirely experiencing things as Cock, yes, that was quite pleasant. And sleeping as Cock is interesting, especially after being masturbated and pissing. I felt so warm, and comfortable, and cozy. I felt... loved? I felt like my owner was the best, and hoped that he was as happy as I was."
"You're always loved," Ty said, "and yes, you made me very happy too. Though when you're only my cock, I also miss your human form."
"Well, next time, when you're ready to sleep, keep one of the split me as your cock, and one as human, and merge me again after you wake up."
Ty smiled. "My thoughts exactly. You're the best!" They kissed.