Just now, I was going through my podcasts in iTunes looking for things to add to my "Today" playlist so I'd have something to listen to during work and my commute. Under the heading of a particular science podcast, I saw that the latest episode was about Saturn's moons and after a moment's pause, I decided against selecting it, saying, "Nah, I like Jupiter's moons."
Then, somewhere, I could hear the sound of any future children of mine being unborn.