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If the bodies are noticeably different, it would take a bit away from the "twin" effect... but I am reading now that Pukimai did stress the "face," and thanks to Casshern2's wonderful effort, those faces (and hair styles, too) do look remarkably similar.
The main thrust of this thread is intriguingly whether other examples of near-"twinnishness" may be pointed out, and I look forward to our experts who know so much about JAV ladies to rise to the challenge.
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