Yes, Mandy, that is a possibility. Oral chlamydia is uncommon, but yes its a possibility.
He would need to be tested and treated.
Amazona - That's true, but that is a very rare cancer, as stated in the article. In the US, I think there are only about 40,000 diagnosed with this each year, and they are guessing that 10,000 of those are from oral HPV.
I know some of this stuff is scary, but its important to keep it in perspective.