习以成性

Explanation: 1. That the original cost of that habit. Qi Liu day, "New Theory of Custom": "people living here, learning to become sexual, that the vulgar Yan." Tang Bai "policy options": "Chen Wen human impermanence heart, learning to become sexual; States impermanence customs, education is shifting wind. "2. generally used to refer to hard to change bad habits. Sima Guang Song, "stop begging bow names baojia Letters recruit sub-_set_ long": "No Country ... ... drink Bo Lai Zaidi wandering, learning to become sexual." Luo Da Song Jing "Helin Yulu" Volume Thirteen: "From this and the learning to nature, to anchoret is afraid of feet, the incumbent is afraid of Jane books, grab gold is not afraid of city people. " Thesaurus:  Habit is second nature., way artlessness, Habits and sex into