[1] 视觉陷阱:一种作画技巧,使二维的画给人以极度真实的三维空间的感觉。这种技法起源于巴洛克时期。 [2]克利夫兰丑闻:occurred in 1889, when a homosexual male brothel in Cleveland Street, Fitzrovia, London, was discovered by police. At the time, sexual acts between men were illegal in Britain, and the brothel's clients faced possible prosecution and certain social ostracism if discovered.(维基给出的解释)