PSA how often for 62 yo man

I've always been awake during my (3) colonoscopies, and find watching it on tv to be quite fascinating, especially the doctor explaining what I am seeing, like the appendix opening, etc. My primary care physician had a good bedside manner and the DRE's weren't too bad, but when I saw the urologist, who has done way more of them, I knew I was in the presence of an artist. No fuss, no muss.