What is the origin of the saying 'once you go black you never go back'?

No one knows for sure who first came up with it; it's appeared in everything from movies, to comedy routines, to pick-up lines at the local bar or pub.

It's usually taken to mean that after a non-black woman has sex with a black man, she won't want to go back to a relationship with a gentleman of her own race or culture.

It's a way of affirming racial identity, by implying that men of African descent are better endowed, or better lovers.

Recently, it became like a culture, that if a woman of non-black race never dated a black guy is like she never experiences life.

这个说法“once you go black you never go back”（一旦你去过黑社会你就回不来了）的起源并不明确，它在不同的文化和背景下有不同的含义和使用场景。这个名字通常与描述一个人加入某个群体或组织后很难退出或改变自己的身份有关。在西方文化中，这个说法有时被用来形容一个人一旦涉足犯罪世界，尤其是黑社会，就很难再回到正常的生活轨道。这个说法的具体起源可能难以追踪到某个单一事件或个人，它可能随着时间在不同的社区和文化中发展和演变。