Colin Marshall unearths Do Communists Have Better Sex?, a 2006 documentary (NSFW) that suggests East Germans did, indeed, best their West German counterparts in bed:
The documentary proposes that, for all its deficiencies, the German Democratic Republic actually put forth a remarkably progressive set of policies related to such things as birth control, divorce, abortion, and sex education — a precedent to which some non-communist countries still haven’t caught up. However forward-thinking you might find all this, it did have trouble meshing with other communist policies: the state’s rule of only issuing housing to families, for instance, meant that women would get pregnant by about age twenty in any case. We must admit that, ultimately, citizens of the showcase East Germany had a better time of it than did the citizens of Soviet Socialist Republics farther east. And if the Ossies had a better Cold War between the sheets than did the Wessies, well, maybe they just did it to escape their country’s pervasive atmosphere of “unerotic dreariness.”
The Dish 