[I expect that at some point in our past, maybe even after the screening-off point in which case I could look it up if I was on the Network, somebody ran a regionalized experiment to see what happened when people matured and lived with access to porn, and Civilization is on the no-porn default because the results looked worse that way.  It's obviously easier to run the experiment if the Network has no porn on it to start with, but we wouldn't persistently keep all of Civilization in that state just because it made some experiments easier.  We're not science maniacs.]

[I expect that at some point in our past, maybe even after the screening-off point in which case I could look it up if I was on the Network, somebody ran a regionalized experiment to see what happened when people matured and lived with access to the more obvious kinds of porn to manufacture, and Civilization is on the no-porn default because the results looked worse that way.  It's obviously easier to run the experiment if the Network has no porn on it to start with, but we wouldn't persistently keep all of Civilization in that state just because it made some experiments easier.  We're not science maniacs.]

[I expect that at some point in our past, maybe even after the screening-off point in which case I could look it up if I was on the Network, somebody ran a regionalized experiment to see what happened when people matured and lived with access to the more obvious kinds of porn to manufacture, and Civilization is on the no-porn baseline because the results looked worse.  It's obviously easier to run the experiment if the Network has no porn on it to start with, but we wouldn't persistently keep all of Civilization in that state just because it made some experiments easier.  We're not science maniacs.]