The notion that sex “gets in the way” of friendships between men and women isn’t absurd. But it doesn’t follow that such friendships are doomed. Most people can control their urges. And such relationships are valuable. They may even help the world become a more equal place.

We also peer into Trumpworld, where there are roughly three foreign-policy camps: internationalist hawks, neo-isolationist “restrainers” and “prioritisers” who think America should focus on China. So far they’ve hung together. The war in Iran may change that.  

And to test your knowledge of the week’s other news, try our latest pint-sized quiz.