The origin of today's question is cracked.com.
In the article, 2 independent examples of naked male art (sculpture) is present:
Pin-up art on one of V- rockets at Peenemünde
This definitely wasn't the trend in German art during Bismark time. Nor did Hitler claim to be philosophically/spiritually descendent from classical Greeks or Renaissance Italians.
Why were the Nazis so supportive of this? (by comparison, Soviets would never be so open to what they would consider "pornography"). How did this official level of acceptance come about?