Do you have an iPhone?  I have one and love it. But I didn't know that Siri was really 'Agent Siri'.  However, there is a way to keep her from telling on you.

A recent article from Daily Finance detailed how much Siri knows about what you say.

The article states; "Wedged into the iPhone Software License Agreement, Apple warns that "when you use Siri or Dictation, the things you say will be recorded and sent to Apple in order to convert what you say into text."

While many people have had some fun asking Siri all sorts of crazy stuff, just keep in mind that everything you say goes to an Apple server farm in North Carolina.  If  you're a little freaked out right now, the Daily Finance article explains how to change the settings. This way, no one will know about you asking Siri her measurements.  Admittedly I did and she didn't appreciate the question!