Last night I gave a talk to the University of Nebraska's FOCUS Greek group on John Paul II's Theology of the Body. It was a rough conglomerate of the ToB and Natural Law, with emphasis on chastity, marriage, and the famous Trampoline analogy.
Here's a link that should allow to stream or download. Either follow the "listen to audio" on the left side, or just click the 32.4 MB hyperlink. at the bottom.