Mojo, you can disable the always listening feature. Then you have to touch and hold the top to activate the Siri.

Also, Apple never sends any audio data to its servers unless you’ve triggered the device with the activation phrase “Hey Siri” or have touched the top to activate Siri. Even then, personally identifiable data is scrubbed and never stored — raw waveforms are never stored anywhere, only interpreted words.

I can explain it to you but I can't understand it for you.