Fifthly, the religious life. This is a distinctive way of life that is almost wholly absent from Protestantism, except for High Church Anglicans (and then only rarely). Who are monks, brothers, friars, nuns, sisters, etc.? Why are some people called to this unusual lifestyle? What do they do to serve the Church and the wider world? What lessons can Catholics living in the secular world learn from them?
Sixthly, the Church’s teachings on the dignity of the human person, the dignity of human labour, the culture of life, and so on. Pope John Paul II produced an inexhaustible wealth of amazing teaching in this field at a time of momentous historical change throughout the world.
It would also be useful to provide some kind of overview of what the Catholic Church is and what it’s history has been. Most Protestants, for example, probably have no idea that the Latin Church is only a part of the worldwide Catholic Church. They probably have never heard of, let alone met, a Maronite or a Chaldean. They probably would be fascinated to know that there are Catholic churches that celebrate Byzantine or Syriac liturgies. They probably have no idea the we have eastern patriarchs in the College of Cardinals.
It would also be essential to explain to them the significance of the Second Vatican Council. For every Catholic who has lived through any part of the past 57 years, the Second Vatican Council has been the central event in the history of the Church in our times. Not without good reason has it been called a second Pentecost or new Pentecost. It opened the windows of the Church to the world so that we could see out and they could see in. In terms of dialogue with Protestants, this is the most important thing to happen since the Reformation. In terms of dialogue with all other churches and religions, this is the most important thing to happen since, I don’t know, the East-West schism, the birth Islam, the persecutions of Jews in medieval Europe.
So there you have six, seven, maybe eight topics to cover, each of which can be split into numerous sub-topics, every single one of which is more important than the Church’s teachings on sex.