There is a thing in psychology called "observational bias" (https://en.wikipedia.org/wiki/Observer-expectancy_effect https://en.wikipedia.org/wiki/Observer-expe

There is a thing in psychology called "observational bias" (https://en.wikipedia.org/wiki/Observer-expectancy_effect https://en.wikipedia.org/wiki/Observer-expectancy_effect) which is why when you buy a car of a certain model you tend to see more of that model on the road. Our brains filter out so much noise that when we expect to see something, our perceptions don't filter it out, and we see more of it. This can make you believe someone else is "listening in to you" when it is really just your subconscious changing some of the filtering it does ...