"...is to be a cat girl. If I'm already a girl anyway, I want cat ears and a tail."
"Oh," Karyn said. "You know, that's a good idea. Now that you say it, I wish I had tried that myself in all this time."
"Yeah well, just be careful with using the 'wish' word willy-nilly when the rock becomes active again. You might want to make an effort to get out of the habit of casually using that word," Jon chided.
"Oh. Yeah. That's good advice. Though I won't be holding it much of the time, I think. But that makes twice that we've accidentally done something by not being cautious about that, once for each of us. With me, just spacing and forgetting I was holding it at all, and you, being too confident that holding it in a box would insulate it when it didn't. Now that we understand its behavior a little better, we can, well, you're right, I should definitely break the habit of saying 'I wish' so much. Anyway, so cat ears and a tail, coming right up."
Karyn started with the ears and stuck them on top of Jon's head. A big pair of jet-black furry ears, with a lot of fluff on their insides too.
"Your original human ears didn't disappear," Karyn noticed.
"It must be because they weren't attached to the same location on my body," Jon said with glee as she flicked her ears around. "Like when you accidentally put the vagina on my leg, it didn't make my male genitals disappear, it was only when you put them over them in that spot. Actually I'm kind of liking having four ears. Ha ha, it's a four-ear transformation. Get it?"
"Get what?" Karyn asked.
"A four-ear transformation. It's a math joke. Fourier transformation. Never mind. Can you fix my voice too? I want to have a nice, high girl's voice."
Karyn pulled out a new neck and put it over Jon's. It didn't look different.
"Testing, hello, wow," Jon said, delighted with her new voice.
"How long a tail do you want?" Karyn asked.
"Oh. Yeah. That's an important parameter. What do you think Karyn. Knee length? Or should it reach the ground? Or somewhere in between? Or even longer than my legs? I might trip on it then."
"He he," Karyn said, pulling a massive fluffy black tail from the drawer.
"Oh, wow, long it is then," Jon said, as Karyn attached it. Jon relaxed her tail and observed it reached the ground with a little over a foot extra.
"What's it like?"
"Oh god, it's amazing," Jon said, swishing her tail. "But don't expect me to be able to explain it. Just like I'm sure you can't explain what it's like having four arms to me."
"Oh. Yeah. But I can certainly show you!" Karyn pulled out two new arms for Jon.
Jon would have pulled off a :3 face if she had one, as she held up her arms and held still for Karyn to attach them.
"I think I might fall in love with being like this," Jon said, almost dancing around, swinging her arms and tail, swiveling her new pair of big black cat ears every which way. "I don't think there's any way this could be better," she continued.
"How about with paws instead of hands and feet?" Karyn asked. "Opposable thumbs, who needs them, amiright? The question is, which is more useful, two hands, or four front paws?"
"Oh?" Jon said. "That's a bit..."
"You're really cute, being a little bit furry. But want to try making things get really, really furry?" Karyn asked with a smirk.