I had a worm. Once. In Scotland. Actually the worm came out in Ireland, but I'm pretty sure I got it in Scotland. I ordered the smoked salmon salad and didn't realize that smoked salmon was raw and only smoked, not cooked. I was only like 21 at the time, jeez. They don't teach that stuff in school in International Falls MN. Anyway, what I did learn in I. Falls was that you always eat your food. All of it. And so a few days later in Ireland I went to the bathroom and found what looked like the inside of an onion ring on the toilet paper. Like a cooked, invisible (see-through) onion. I freaked out! And then I remembered the raw salmon. For YEARS this was my story and I told it a thousand times.
Last summer I had a similar inside-of-an-onion ring on my toilet paper, and thought, "O.M.G. I still have that worm from 12 years ago in my body?" And then I realized I had been eating a TON of grapefruit lately. And, come to think of it, I had been eating a TON of grapefruit on that trip to Scotland/Ireland. In other words, I never had a worm, just an undigested piece of citrus fruit posing as a worm.