A bit more testing.

"Okay... So now what happens if I say... Orgasm!" He boomed

As he did, he watched both women immediately begin to orgasm.

"Ah. Ah. Ah. Ah." Tsunade droned robotically. Meanwhile, Shizune made no sound, her eyes remaining blank, her body remaining limp, but she began to breathe more heavily.

And as Naruto watched... They just kept going. Not stopping. After all, he hadn't TOLD them to stop, but he was expecting the orgasm to end like it would naturally.

"And stop orgasming!" He finally said. And the two immediately ceased. There was no tapering off, no time for them to cool down. They simply immediately ceased their orgasms, as Tsunade continued to lap away at Shizune's pussy.

"Is it normally possible to orgasm that long?" He mused to himself "Lemme try something. Shizune! Grow a tail!" He said.

THAT however, did not happen.

"Okay. So I guess my commands do have to be physically possible... I guess that means it's technically possible to just orgasm forever like that." He pondered.