In the Royal Court's Porn Play, Ambika Mod stars as an academic hiding a damaging addiction. She and the drama's creators discuss the challenges of staging masturbation, and getting audiences to relate to its troubled lead In Sophia Chetin-Leuner's Porn Play, which has just opened at London's Royal Court, Ani is a 30-year-old academic at the frontier of intellectual discovery: she's winning awards for her radical rev…