let's see.. remember the doctor should only have one hand rubber gloved..and ask for the lube...
your younger than me, but the drill will be.. loose weight, eat healthier, elminate caffeine, salt and fat, quit smoking, (if you do), cut out the booze, excersize more, than the hysterical one.. elminate stress from your life..
.. if it is time for asscam...DO IT!
Good Luck, and sucks having to expose your shortcomings. but its gotta be done. And as best as ya can, do what the doc says.