This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Forensic Medicine
[{'content': 'Frotteurism is - \nSelect and explain. \nA. Sexual pleasure is obtained by witnessing the act of urination, B. Sexual gratification by rubbing private parts, C. Sexual practise involving three people, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]