A long time ago, a family member was fascinated with Johnny Quest. I would stop buy the local B&M hobby store and buy the latest one as a gift. Over time, it was almost a complete collection. There were 4 that had double covers. My thoughts about this at the time was shoddy quality control, so I would flip thru other comics when I made my usual stop to buy another Johnny Quest. Within a very short period of time, I was surprised how many different comics had double covers. I then became fascinated myself, and would stop in, go thru the comics without regard to what or who the subject matter or hero or artist was (a sin, I know), and over a period of a couple of years, I had 2 boxes of double covers. I still have them. I don't know why I do, but I think it is because it somehow soothes my psyche into acknowledging that I accomplished something, which I have not. So, there is that.