Rei's third joke

In the original long-form version of Rome's Revolution, in Part 2 (when it was still VIRUS 5), Rome has just given birth to Aason. Rei, Rome and Aason are in Rome's room in the Vuduri compound as she recovers. They know they have to leave for Earth and soon to head off a possible strike force that would come and wipe out the Ibbrassati. Rei wants to lift the tension in front of them:

     “Yes,” said Rome, “another day or so. Then we must go.”
     “Great. Can’t wait,” Rei said, resignedly. His mind worked furiously trying to figure out some way to lighten the mood. He looked down at little Aason who appeared to be drifting off.
     “I got it,” he said, snapping his fingers.
     “Got what?” Rome asked.
     “I just thought of my first Vuduri joke.”
     “Tell me,” Rome said.
     “OK. What did the one Vuduri say to the other?” Rei asked.
     “I do not know,” Rome said. “Tell me.”
     “Nothing. The Vuduri don’t talk to each other.”
     “Heh,” Rome laughed. “That is funny,” she said. “Do you have any others?”

I think Bruce gave me this one. Rei has one other joke. I'll reveal that in a day or two.