C'mon Blogspot? What gives?

Why when I use the [next blog>] function to randomly peruse any given blog do I see an endless succession of blogs written around the very same theme? Yesterday all I saw was blogs about bicycling. Today it is motorcycles. I have the sneaking suspicion that some variable of my web surfing is being apllied to the blogs offered me to read? I can't help but think that something heinous is afoot at the Circle K (or the square B).