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Gerda was a successful artist and illustrator in her own right, and in addition to painting beautiful pictures of women, painted some highly erotic ones as well. You may wish to wait until you get home to check them out courtesy of the Dorothy Surrender's blog if you're curious since these images are a bit steamy for work.
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They settled in Paris in 1912 and worked as illustrators, with Einar focusing on painting landscapes while Gerda finding commercial success focusing on books and fashion magazines. Lili's body type also allowed her to pass quite easily as a woman, which she did from 1910 onwards.
When one of Gerda's models no showed, she asked Lili to fill in to great success. Gerda then continued to use Lili in a series of paintings as her model. Sometimes she was dressed in high fashion clothes, other times in the nude.
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It's going to be interesting to not only see this piece of transgender history come to the silver screen, but see Nicole Kidman playing a transwoman as well.
Looking forward to seeing this movie when it finally comes out.