Marg75
I'm sure they don't listen!! They just react to what you order on Amazon for goodness sake and what you ask them about. We love ours, talk to our daughter face to face on our Alexa Show and she lives 200 miles away and have music etc on our Echo Dot in the kitchen.
They do listen Marg75, all smart devices listen to everything I believe (unless specifically programmed not to). I wasn’t even using my iphone, it was sitting in the middle console in the car when my DH said a swear word, actually in jest, and my phone piped up ‘there’s no need for that kind of language’.