Strange Connections

I just got this really odd e-mail from Amazon.com. (Well, technically, I got it a few days ago, but I'm backed on my e-mail, OK?) It said, "We've noticed that customers who have purchased 'Babylon 5 - The Complete Fifth Season' also purchased 'The Partridge Family - The Complete Second Season' on DVD."

Possibly there is some connection between the two shows, but trying to think of one just makes my brain hurt.