What is do the curtains match the drapes meaning?

The phrase "do the curtains match the drapes" is often used as a euphemism to ask whether someone's hair color is the same as the hair in their genital area. It is typically considered a crude or inappropriate question.

The origins of the saying are unclear, but it may be related to the idea of matching interior decorating elements, such as curtains and carpeting. It is often used as a sexual reference or innuendo in popular culture, but it is generally best avoided in polite or professional conversation.