Child X has an AppleWatch and has spent hours since it arrived (2 days ago) exploring its many functions and excitedly demonstrating them all to me, including a health app that buzzes when you should be breathing in and out (just in case you forget) and ApplePay, which he is currently showing me.
Him: You just press here and...
Me: That's so cool. Really convenient. But what if someone uses your fingerprint from your severed hand?
Him: Then you have far bigger problems to worry about.