Had mine done a couple of years ago. The exam was the easy part, the drinking of the NASA grade laxative was the tough part. Felt hollow going into the exam. During my exam I was in and out it. I do remember the doctor asking me if I was in pain, I guess I was squirming a bit, I told him I was doing fine until we got to his watch. He said he thought he'd heard them all but hadn't heard that one.

I'm repeating what others have said, if you're over 50 get it done. Save your own life so others around you don't have to care for your dumb ass (pun intended).