If a person wants to know if someone's pubic hair is the same color (or in some cases, same style) as the hair on their head, they might ask "
Do the drapes match the carpet?"
The drapes are hair; carpet is pubic hair. This is akin to asking "Is she a true blond?" Someone's obviously dyed hair might prompt this speculation: "I'll bet
the drapes don't match the carpet."
Lisa has a
shaved head. I wonder if
the drapes match the carpet?
Didn't she used to be a brunette and now she's a blond?
I'll bet the drapes don't match the carpet.