Amazon usually just suggests other movies I might like

This afternoon, my dentist urged me to buy an electric toothbrush, so I went to drugstore.com to order one. I found the one he recommended from the list they offer and clicked on it. When I did, the site also suggested items that other people buying the same toothbrush often buy.

I expected to see dental floss, toothpaste and perhaps even other toothbrushes.

Instead the site recommended, not one, but three, home pregnancy tests. Now I'm not sure the exact relationship between my gums and the need for a pregnancy test, but that's one hell of an endorsement for whiter teeth.