Another view was offered by John H. McWhorter, a linguist and a senior fellow at the Manhattan Institute, who pointed out that the women associated with introducing the word — Ms. Winfrey, the Miranda Bailey character on “Grey’s Anatomy” — are middle-age African-Americans.
“The reason that vajayjay has caught on, I think, is because there is a black — Southern especially — naming tradition, which is to have names like Ray Ray and Boo Boo and things like that,” Dr. McWhorter said. “It sounds warm and familiar and it almost makes the vagina feel like a little cartoon character with eyes that walks around.”
This is so crazy! Because I constantly picture my penis as a little cartoon character with eyes that walks around too. And I call him Ray Ray! Like this: "Watch out baby, here comes Ray Ray." OK, I don't actually ever say that. But I'm thinking it.