A man tells a story about a stranger who moved into his house and had sex with everyone in the family, the man he tells this story to is a fan of Pasolini and tells the other man not to steal stories from movies
When the script of Teorema refers to Christ's 40 days in the desert, it uses the same location (the Etna) for that desert as in Pasolini's previous work Il Vangelo secondo Matteo