"once you go black, you never go back" meaning in English

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      "expansion": "once you go black, you never go back",
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      "expansion": "once you go black, you never go back",
      "name": "en-proverb"
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  "lang": "English",
  "lang_code": "en",
  "pos": "proverb",
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      "derived": [
        {
          "word": "once you go black"
        }
      ],
      "examples": [
        {
          "ref": "2005, M. W. Moore, For What I Hate I Do, page 61",
          "text": "\"You really think she likes me?\" I asked.\n\"What do you think? You know what they say! Once you go black, you never go back!\" Zac said rhythmically.",
          "type": "quotation"
        },
        {
          "ref": "2007, Robert Reid-Pharr, Once You Go Black, page 10",
          "text": "Thus our young man of words turns to an ugly American joke told most often by his black compatriots as he searches for the title of his study. “Once you go black, you never go back.” Is it true?",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Once someone has had sex with a black person, they will not want to return to having sex with non-black people."
      ],
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          "sex",
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      "raw_glosses": [
        "(informal) Once someone has had sex with a black person, they will not want to return to having sex with non-black people."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "once you go black, you never go back"
}

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      "word": "once you go black"
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      "expansion": "once you go black, you never go back",
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          "text": "\"You really think she likes me?\" I asked.\n\"What do you think? You know what they say! Once you go black, you never go back!\" Zac said rhythmically.",
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        },
        {
          "ref": "2007, Robert Reid-Pharr, Once You Go Black, page 10",
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        "Once someone has had sex with a black person, they will not want to return to having sex with non-black people."
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        "(informal) Once someone has had sex with a black person, they will not want to return to having sex with non-black people."
      ],
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        "informal"
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  "word": "once you go black, you never go back"
}