5. Berlin
This city has a reputation of being the sexually liberal place. People from all over the world come to experience this clubbing paradise with sex parties on (almost) every corner. Thanks to liberal attitude when it comes to pornography, prostitution, and sexual education as well as a number of swingers clubs which are one of many Berlin’s attractions, this city definitely deserves to be listed as one of the most sexually liberal cities in the world in 2018.