Why doesn't Alfonso dare to color his hair?

i tried and did some researching and the best i could find was-

Alfonso didn't dare color his hair. But one day he had had it butched on the top, like in the magazines. His father had come home that evening from a softball game, happy that his team had drilled four homers in a thirteen-to-five bashing of Color Tile. He'd swaggered into the living room but had stopped cold when he saw Alfonso and asked, not joking but with real concern, "Did you hurt your head at school? ¿Qué pasó?"