You might not believe this, but in the story of Liang Shan-po and Chu Ying-tai as it is told by the Tungkan people, the teacher's wife gets so suspicious that Chu Ying-tai is a girl that she asks her husband to make all the students enter a pissing contest.
你可能不相信，但在東幹人的梁、祝傳說中，甚至有一段是師母懷疑祝英台是女生，要老師讓學生比賽灑尿的情節。