Gaining insight into people thoughts is hard, almost impossible. However, Google stores searches and uses this to predict what others might search for. This is an incredible tool. Here are a couple of examples of the kind of this to expect.

Here are screenshots from Google for what girlfriend expect from their boyfriends and vice-versa.

Another example is how people look for depending on where you are on the world. The first is an example of US searches. The second for searches in India.

Interesting huh?