A lot of what laypeople learn about psychopaths is through cinema, despite psychopaths making up around 4.5 percent of the general population (or between 10 and 35 percent if you happen to be in prison). How movies represent psychopaths shape people's view of them as a whole, so how accurate are the portrayals we see on screen?
If you find a dimension intereseting, we recommend you pick up one or two facts that you find intriguing and place them into your memory. That way you will have 2nd degree information about the topic if it comes up in conversation.
Accordingly, you can do the same with others as well.