You should probably be able to say the word vagina?
Had my pre-op today. The gyne nurse was lovely, slightly scatty but very nice. She handed me the MRSA swabs to do, and said, "So this one is for your nose, and this one is for down there". What made it even better was she didn't say down there probably, but mouthed / whispered it Miranda-style.
Really made me giggle.