Lots of people (especially American politicians like Hillary Clinton) are worried about the effects of violent video games, despite the complete lack of evidence that there is any effect. Perhaps the regular calls for restrictions on children’s exposure to corrupting material should instead focus on team games, now that there is evidence that watching American Football makes people violent.

The author seems to turn up a lot of inconvenient evidence, another paper shows that sexual abstinence improves academic performance, even after correcting for factors such as pregnancy (i.e. the disruptive effects of having a child as a result), emotional and psychological factors and previous academic performance.