I just hope that by the time I hit 40 they can "check" things without having to resort to the finger.
50 is more the "magic age". That is when you should have the much dreaded Colonoscopy. I was lucky in that they put me completely out for the whole thing. It scared the hell out of me when I was taken into "the room" and saw the actual Endoscope. This thing looked like it was made from 5/8" fuel line hose, and was so long it had graduations on it! The nurse tested it before the doctor got there and put me under. It had a headlight on it! I asked the nurse how hot that light got and she laughed like hell.
They use air to inflate your intestines so they can see everything, and after you wake up they told me if I had to fart to do so and not hold it in. I said if you insist, and let a long loud one rip! Both nurses were laughing so hard they had tears in their eyes. I said if the doctor has ordered me to fart, then that is exactly what I intend to do! Even he laughed. The procedure wasn't bad, but drinking 5 liters of that crap the day before was pure hell, along with what followed. You won't believe what comes out of you. Everything went well and he told me he didn't want to see me for 8 years. I said that would not be a problem. Bill T.