Phone Case Awkwardness

This 11-yr-old girl saw my phone case, apparently for the first time ever.  Which is odd, as I'd had that case for about 2 years.  My phone provider is Virgin Mobile.

Girl: Oh WOW!  I love your phone case.
Me: Thanks.
Girl: Where did you get it?
Me: Ummm... I can't remember.  It's been a long time.
Girl [raises an eyebrow]: Really?
Me: Um.. Oh, wait.  It was the Virgin store.
Girl [gasping]: The- the what?
Me: The. Virgin. Store.
Girl [looking very uncomfortable]: Um.  I don't- ah... You shouldn't... I don't think you should say ... that word.

I'm guessing her phone provider is a less awkward-sounding name.