Grounded danish plugs don't fit Schuko sockets, but Schuko plugs fit danish sockets (but aren't grounded).

This leads to a staggering amount of ungrounded devices in Denmark, as most are imported and making a variant for such a tiny country isn't profitable.

Fun fact: the danish power plug was created by Lauritz Knudsen, a Danish company who had a monopoly. They are the reason Denmark uses this plug as the only country in the world, and Schuko only became legal to install in houses quite recently, so 99% of houses still use their standard.

LK has since been bought out by Schneider Electric but we are still stuck with our special plug and most imported devices are still ungrounded.

Thanks for listening to my Ted Talk.