Kreeft is amazing. He is a professor, a theologian, and an author, and yet what he says is in perfectly understandable English! You really should read the whole speech. Here is a little sample:
We moderns think sex is for us; it isn't; it's for our children. We moderns think we're so enlightened because we're not legalists any more, we're personalists, we're about people, not about laws or rules or commandments. We think of the people who make sex, and we want those people to have fun and be happy. Which is fine, but we're so fixated on the fact that people make sex that we've ignored the fact that sex makes people.
h/t Mike in CT (again!)