I was watching Law and Order, the new season where the Lieutenant finds out she has cancer. She goes into chemotherapy with little fanfare. I didn't know what kind of cancer it was until I saw this particular episode, though, where her doctor gives her the news. The exchange culminated in the doctor telling the patient, "You have HPV. It's the virus that causes cervical cancer."
 
Okay, whoa, whoa. THE virus that CAUSES cervical cancer. That, to me, implies that there's only one cause for this particular form of cancer, and that's a sexually transmitted virus.