Denmark’s principal exports are: bacon, dairy products, Lego and babies. Well, not babies exactly, but the raw material. According to The Vikings Are Coming (29 January), a thought-provoking and well-rounded film in the Modern Times series, Denmark is now the “sperm capital” of the world. The reason is that, unlike Britain and most other European countries, Denmark permits anonymous donors; and they are the preference of many women. Early on we saw Kel and Anna, a lesbian couple, cheerfully scrolling through the donor profiles on the website of the biggest Danish sperm bank. “It is a shop,” said Kel, faintly awestruck. “It’s like going on Amazon and buying a CD.” There are baby pictures of the donors, handwritten notes explaining why they ar