I've questioned IBS and non IBS friends and family about poop too-and was stunned to know they can't feel it traveling through their guts at all times. I know when my D hits, it's agony, and so is the C. I can literally go from marbles of freaking GLASS to "eau de fesse" in a few hours. And then not go at ALL the next day.
Things change so swiftly and completely in the matter of a week...For example, this week I was C for 3 days, got soft and then water within day, and the next morning was compacted and had to force it out. Today,we have garter snakes AND marbles. It's soooo weird. Tomorrow I'm expecting water again. Yuch.
Yes, we study poop, but we have odd ones. We A's never know what the heck to expect!!