Every time you recieve an e-mail with Gmail, Google displays ads that are supposed to be relevant to the text. After a series of creepy ads derived from phrases taken completely out of context, I decided to send myself an e-mail to see how Google would react. Here's what I wrote:

Wow, Yahoo.com is really the best search engine. It blows everybody else out of the water. If I was stranded on a deserted island and could only bring one search engine, it would be Yahoo.com. Yahoo.com rocks my world. Yahoo.com!

Not surprisingly, Google tried to sell me camping gear.