My Monday post on studies suggesting that women are much more likely to get motion sickness from using virtual reality has generated a lot of feedback -- it's been shared dozens of times from my Facebook page alone -- so I sent a quick e-mail to someone far more qualified than me to talk about that topic: John Carmack, CTO of Oculus VR and an evangelist of virtual reality for some twenty years: "Since several studies suggest women are much more likely to get sick using VR than men," I asked him, "has Facebook or Oculus ever extensively studied VR and nausea by gender?"

"I’m not involved with any of our user studies," Carmack told me, "so I don’t have any insight there." He pointed me to Oculus' media contact, who I'm following up with now.

Does that mean, I continued, "that you don't see nausea as a deal-breaking problem for VR ever going mass market?"

Carmack's reply to that question was an interesting one: