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KRISTIN HENSON first started learning American Sign Language when she was a student at Rochester Institute of Technology, which has a significant deaf population. Her dorm mates were more than happy to "help" her out. She once signed "I want a large pizza" to the worker at the school's dining hall, only to discover that her friends had taught her to sign "I want lesbian vagina." Since then, Henson has become fascinated with learning dirty phrases in ASL and sharing them with the world at large.