Keyword Mystery: Who Googles Amish Sperm

What do you get when you mix together a post about autism among the Amish and a post comparing two TV shows, which includes a reference to sperm donation? The result is that people who search for "Amish sperm donation" find my blog on Google. I first noticed this oddity three years ago, though back then it was a one-time thing. Lately, I've been getting hits from people searching for variants of the Amish+sperm combination almost every week. Why the hell are people regularly searching for this? Is there something I'm missing? A new documentary about Amish mating habits or fertility? Is the Amish population shrinking? What's going on here?!?

Please, if you got to this post while looking for ways to donate sperm to the Amish (or to receive a donation from them), leave a comment and explain yourself.