He has her massage him while he asks a few things.

"Why don't you massage me while I ask a few more things of you?" Naruto asked, and she nodded, floating up.

"Sure thing Master," she winked in a mischievous manner. She floated to get behind him, positioning her body horizontally in the air as she put her hands on his shoulders. The way she floated gave Naruto some ideas on positions he could fuck her in. "So, what did you want to ask?" she cooed at him.

"Well... Why exactly did what I wrote earlier not work and vanish?" Naruto asked.

"Like I said, Sex Notes are not **** Notes," she replied, working her elbow into the sore muscles he had from tapping into the fox's power.

"Yeah," he moaned. "You did say that... But what does that mean? Are **** Notes some kind of counterpart that kills people? Who would even want something like that?"

"Asks the guy who literally tried to use a Sex Note to kill someone," Ria deadpanned. "Plus, this is a world of ninja, who are often assassins. Such a tool would actually compliment your profession well."

"... can't argue with that," Naruto groaned as she moved down his back.

"To answer your question though, as a matter of fact, they are. Just write down a person's name, they die of a heart attack, if you know their face too. Same reasons as why the Sex Note has that requirement to use. You can also manipulate the cause of ****, so long as it is physically possible. The Sex Note's effects are more versatile, as you can actually change a person's form, except for one thing, you can't deliberately use it to try to kill someone or otherwise arrange their demise."

"Deliberately?" Naruto asked, even as she pressed her boobs against his back while using her hands to massage his biceps.

"Yes, though you can cause incidental deaths, essentially deaths by happenstance, but only if you were ignorant of it happening. For example, if one of your slaves who was also a medic was called to you via the Note, and you were unaware that they were currently in the middle of saving someone's life, then you would have killed someone without meaning to, but the Note will allow that. Basically, it's about intent and knowledge. If you knew about the treatment of course, and wrote the medic's name anyway, it either wouldn't work at all, or it would only work once said medic has either already failed or stabilized the patient, depends on whether you intended to mean immediately, or as soon as was convenient."

"Huh... So... Because I wrote that Sasuke would kill Orochimaru, that invalidated the whole entry?"

"Correct," she said, now stroking his torso, then she nibbled one of his ears.

"But... Say I was aware of the possibility someone could die if I used the Note, but it wasn't a sure thing... Like... Going with your medic example, if I was aware Sakura was at work, but didn't know the nature of what she was currently treating, or even if she's treating anyone at all, and wrote her name, would it work or not?"

"It would," Ria shrugged, squashing her tits against Naruto's back.

"So... If I were to write what I did before, only making Sasuke escape Orochimaru by the means he so chose-"

"I see what you're getting at. Yes, it would work, but it would be entirely up to Sasuke himself whether he killed Orochimaru or not during said escape. So you can HOPE Sasuke does it when you write the entry... You just can't knowingly assure it. That's the closest loophole there is to that unwritten rule of the Sex Note."

Naruto nodded, and considered whether to play with Ria some more.