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Marie Antoinette in her trials was accused of Thr German Vice (lesbianism) among her litany of debaucherous accusations (historically, she was fairly innocent and not terrible as royalty goes).

In the 19th century, the naturist / nudist movements started in Germany. In the 1920s, the German sex institute that studied and sought to normalize transgenderism (and the rest of LGBT+) was the first target of the NSDAP hate campaign.

I'm pretty sure Germany has been the bleeding edge of sexuality since the middle ages, if not before.