Yeah, I know, you just threw up a little in your mouth. It happens.  Actually, I did not come here to discuss Oprah's vagina.  I came here to discuss her use of the word vagina, or, more precisely, her lack of use of the word vagina.

Oprah, instead, uses the word "VaJayJay". 

While nothing says we take women's health issues seriously like making cutesy nicknames out of anatomical descriptions, we all know vaginas are dirty and bad**, right? 

They even used "VaJayJay" and "low heart" when discussing the vagina with an OB/GYN. 
Admittedly, the ability to take said OB/GYN seriously was greatly
diminished by the fact that she was discussing how to direct her chi (NSFW link, but not that really gross NSFW level) to her vagina in order to induce orgasms*.

What the hell, people?  You can televise a studio full of women mentally "smiling with their low heart" (i.e., mentally jilling), but you can't say vagina?

Check it out.  Vagina.  Vagina.  Vagina.  Not that hard.  It's even originally a Latin word (meaning vagina or scabbard - the things teenage boys remember from high school Latin class).  So, you can pretend you are speaking a foreign language.

The very act of replacing a scientific term with a juvenile euphemism implies that female sexual organs are dirty and inappropriate for a public discussion of medical issues.  Instead of encouraging serious discussion of women's health, it encourages behavior equivalent to that of giggling teenagers.

For an even better rant, check out Rebecca Watson's at Skepchick.  She's got vagina self-interest and experience fuelling her snark.  I bet my rant will kick her rant's ass if anyone every stops taking penises seriously***.

* The chi part is ridiculous.  Female orgasms are dead serious.
** Individual results may vary.
*** Hasn't happened yet.  10000 years of civilization and counting.