Actually a psa test is a blood test. It measures a "protein specific antigen" (had to pull out my lab work to look that up)
The higher your psa number the more likely you are to develop prostate cancer, or may already have it.
Oral test? That's a pretty long way from the mouth lol.....
On a side note, when I was getting hired by the fire dept I had a really hot lady doc do my prostate exam. The only one I ever actually enjoyed.
Yes, I was trying real hard to think about anything but this girls finger up my butt. I wanted to avoid any embarrasing stuff.