When I was in Vietnam, I served in the field with a young man who had escaped from Cuba. He told me he had been in training to be a priest right up until it was time to take his vows. Then he saw Casablanca and he realized that if women like Ingrid Bergman (Ilsa) were in the world, he could never be a priest. He left, came to the U.S., was drafted and went into combat. This is one of the best movies ever made.