Cucumbers cause indigestion?

I've found recently that whenever you learn a new bit of information, you will most likely hear someone make reference to it in the near future. Sometimes this happens to me when I hear someone use a strange phrase I've never heard anyone use. I will hear someone else use that phrase on TV or in passing soon after.

That happened to me again today. The weekend before last I went into town to visit my parents and had lunch from outback with them. The salad I ate had sliced cucumbers in it, which they warned would give me indigestion. They said that cucumbers give most people indigestion for some reason. I'd never heard of this before, but they were right. I walked around burping for an hour or so later that day.

I heard the notion that cucumbers cause indigestion again in a book of Taylor's, Mere Christianity by CS Lewis. In the later part of the book he made reference to Cucumbers causing indigestion, which I found strange, but before hearing that fact from my parents, I probably would've paid no attention to that.

It's a strange occurrence when you have something like this happen. I always thought that it was just a big coincidence when I would hear something new, and then someone on TV would repeat it, or another friend would repeat it. But, it's more likely that I'm just more aware of it after someone says it. If I hadn't heard that info from my parents, I wouldn't have paid any attention to the fact that it was in the book I was reading 2 weeks later.