This test is very important so try to bite the bullet and have it done! If they find a weakenend sphincter it can be addressed PRIOR to your reversal which will make your recovery more enjoyable. I had it done after surgery as I was incontinent. Believe me, after what I had been through with having unrelenting chronic bloody diarrhea, this test was a walk in the park. Just remember, your doctor studied colo-rectal surgery, it's not as if he is grossed out by what he does! The other thing to remember that after your reversal you will only have to have your butt looked at once per year! And no more colonoscopies, no more medications, and no more prep treatments. I have had my pouch for 7 years and promise you this will get better.