Douglass' embarrassment is related to the fact that he was whipped for not agreeing to remove the clothes he was wearing.
Although you haven't shown it, we can see from questions similar to yours that you're referring to "Life of an American Slave," written by Frederick Douglass.
By reading this book, we can have access to the following information:
One such situation occurred when Douglass was heavily whipped because he refused to undress in front of his master, Mr. Covey.
Douglass says that in addition to being painful, the situation was very embarrassing and repeated itself over a long time.
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