One word of advice to people who want to visit Scandinavia and get a first-hand experience of the alleged liberal sexual morals of these countries: Use a f#€”ing condom!
Why? Because Chlamydia is a major epidemic among young Scandinavians of both sexes, so if you don’t use your brains (and a condom), chances are that you will get a really sneaky souvenir from your visit.
But our friends the epidemiologists hold an interesting surprise in store for us. It turns out that Sweden is the home of a specific mutation of the chlamydia virus and with the increased integration of the Øresund region you might have expected the Swedish mutation to appear in great numbers in the Copenhagen region.
As it is, the answer is no: Swedes (to simplify) suffer from one line of chlamydia, Danes from another. The labour markets may have been integrated with lots of Swedes working in Copenhagen but at the end of the day, they go home to have sex with their own kind.