When Discussing Aristotle's Critique of Pleasure as the Good, I

When discussing Aristotle's critique of pleasure as the good, I tell students a little story. I have, I say, a machine. If they will get into it, this machine will give them-guaranteed-a life of more pleasure than they could get any other way. (You can elaborate on this in any number of directions.) Then I ask them how many would like to get into my machine-oh, wait, I say, there's one thing I forgot to tell you. If you once get into the machine, you can never get out again. But-incredible pleasures for the rest of your life! Then I ask them how many want to get in. Interesting results.