Amazon is a Seattle company, hence I have a good friend that works there. The dish is this: over in France a hamfisted programmer took anything that had the "adult" tag and de-listed it. "Adult" in France = porn.
Since their systems are globally linked, the idiot's actions over there affected the systems in the U.S. This shit happened over the weekend, and was corrected on the following Monday. Pretty rapid turnaround if you ask me.
Amazon is pretty well known for supporting its GBLT community, I strongly doubt this was malice, and strongly believe it was one dumbshit's mistake.