"I think I know where you're going with this one Mom. I believe this your favorite type. This good is not something chosen by me, but you!"
"Well Tommy you are on the right track, but this doesn't mean that I chose this type of good either. An example is going to school and studying hard. I tell you to study because it leads to good grades. This doesn't mean that I like to study either, but I know that studying can lead to great things. Studying is a good that is not chosen for it's own sake, but for what it leads to.