Oh you funny man, thinking we have polarized ones! Brits do I think, but most of the eu has unpolarized ones. One of the common 2 socket wall sockets for exam

Oh you funny man, thinking we have polarized ones! Brits do I think, but most of the eu has unpolarized ones. One of the common 2 socket wall sockets for example have just straight bars connecting 2 sockets being 180 degrees rotated, so each socket have line and neutral on different connector. So if you say put a tester in it, one socket will read "correct" while other will read "L/N reversed"