Lisa said to Lisa, "You're me, so you know as well as I do that my intent was for me to merge after the week of grounding was over."
Lisa replied, "Yes, but now I don't want to dilute my memories of a pleasant week with your memories of an unpleasant one. And I enjoy being Ty's cock, so I just want to stay that."
"Has she had permanent mental changes from being my cock for a week," Ty asked Lisa.
Formerly-cock Lisa said, "No, I haven't had permanent mental changes. I just enjoy being your cock. I just want to do that. It won't hurt you, and it won't hurt Lisa, so please just let me do it."
"It does hurt me," Lisa said, "because I duplicated myself with the intention of having both experiences, and now you're taking that away from me."
"I'm not even sure I want you... either of you... to be my cock again," Ty grumbled. "Certainly I'm not going to allow it if you're going to fight with yourself over it."
"Well," said formerly-cock Lisa. "If I won't merge, and you won't let me be your cock, where does that leave us? You don't actually want to have two of me running around, do you?"
"Not my problem," Ty said. "But if you don't sort it out with yourself, I may just unilaterally impose a solution, which you almost certainly won't be happy with."
"Do that, and I'll break up with you," formerly-cock Lisa said.
Lisa disagreed. "That's not for you to decide. I'm his girlfriend. You used to be, but now you're insisting on being his cock, which is not the same thing. I think I'm going to have to side with Ty on this. If you won't merge, as I planned, then I don't know who you are, but you can't be Lisa any more, and I won't much care what becomes of you."
Non-Lisa looked down, sad. "Why can't you just be happy for me, that I enjoy being Ty's cock?"
Lisa said, "Why can't you just merge, as planned, and we'll both have the memories of that? My memories of the week weren't _that_ terrible. It won't dilute your experiences that much."
"If I merge," Non-Lisa asked Ty, "will you let me be your cock again?"
"I don't think it's a good idea for you to be my cock all the time," Ty said, "But I will let you do it at least some of the time, if you're good." This brought back his memory of promising the Cock homunculus, in Lisa's mind, that she would have a cock some of the time.
"OK," Non-Lisa said, "Let the record show that I have agreed, under protest, to merge." She disappeared.
Ty watched Lisa, who stood silent, with a blank expression, for a couple of minutes. Finally, she said, "Wow! That really is a lot of memory to absorb. Now I can understand her point of view, even though as a whole, I don't agree with it."
"I'm just glad that problem is solved," Ty said. "I was either going to have to forcibly merge you, or do away with one. Both options sucked."
"I want to know what your reservations are about having a me in your cock all the time," Lisa said. "Why did you say that it wasn't a good idea?"
Ty tried to explain. "I'm afraid that even if you periodically merge, say on a weekly basis, that having too much experience as my cock will overwhelm your human experience, and that even though the transformation into my cock deliberately makes the mental changes temporary, and your 'operator' has agreed to not leave Cock unsupervised at the controls, that having your memories so biased in favor of being my cock effectively will result in permanent mental changes.
"Despite your love of exotic transformations, you do want to stay fundamentally human, don't you?"
"Most of me says 'yes', Lisa said. "The part of me that was just your cock for a week... that part would be fine becoming your cock permanently, with the mental changes."
"That's exactly my point," Ty said. "I think you can have variations on human form, such as pussy tongues or zippers, as much of the time as you want, without any real harm, but I think being in a non-human form, and enjoying it, for too much time is dangerous, and I don't want you to do it."
"Point taken," Lisa said. "But you did promises me that I could be your cock some of the time, 'if I'm good'."
"Yes, and I'll abide by that. But I don't think we should do it a week at a time, and I think you should have significant down time between the times that you do that. Besides, there are an infinite number of transformations that you haven't tried yet. You must have ideas for other things that you would enjoy."
"Oh, definitely," Lisa said."