I’m a veteran, having had three colonoscopies, and I can attest: No, the prep is not fun, but it’s far from awful. Yes, I got hungry while fasting. Yes, I pooped a lot. But no, when done under sedation, which is how it is done, there’s nothing painful about a colonoscopy. The benefits, on the other hand, are quantifiable. On my second time around, the gastroenterologist found three polyps (known as adenomas), which he removed and sent off for biopsy. They were deemed precancerous, so I was lucky to have had them detected and removed before they could develop into cancer.