For decades, the voices of Holocaust survivors have fostered vital conversations about antisemitic atrocities.One of those survivors is Mark Spigelman, a retired surgeon, professor and medical archaeologist, who volunteers at the Sydney Jewish Museum."When the students ask to hear my stories, I explain to them that I don't have that many memories of events, I have nightmares of events," he said.Born in Poland in 1940, Mr Spigelman was taught to open his blue eyes, smile, never cry, and to only speak German.He was also taught that in public, he was to appear as a girl."The Jewish faith requires that all baby boys be circumcised, so when the Germans were hunting for Jews, the first thing they would do was pull down the pants of young boys," he said."That is why I spent most of the war years dressed as a girl."Inspired by their grandchildren's curiosity to understand more about Mr Spigelman's childhood, his wife Rachel wrote a book for young readers to introduce them to the Holocaust.In the book, Mr Spigelman references a memory where he and his mother were confronted by German officers I didn't understand what they were talking about."In Mr Spigelman's hometown of Będzin, there were approximately 60,000 people before World War II, about 30,000 of which were Jewish.When the war ended, there were just three Jewish children who had survived, Mr Spigelman said.The next time Mr Spigelman properly went to school again was in 1949 in Sydney's east after he, his parents and his brother James Spigelman AC arrived in Australia as refugees."In the schoolyard, my peers came up to me and said, 'Hey mate, tell us about yourself