Read this passage from “No Witchcraft for Sale” by Doris Lessing. What is the cultural conflict in the passage?

Gideon…sighed, “Soon you will be going away to school, Little Yellow Head.” He said wonderingly, “and then you will be grown up.” He shook his head gently and said, “And that is how our lives go.” He seemed to be putting a distance between himself and Teddy, not because of resentment, but in the way a person accepts something inevitable. The baby had lain in his harms and smiled up into his face: The tiny boy had swung from his shoulders and played with him by the hour. Now Gideon would not let his flesh touch the flesh of the white child. He was kind, but there was a grave formality in his voice that made Teddy pout and sulk away.