  We argue that magnetic and electric charges of the Reissner-Nordstrom black
hole are quantized in CP conserving theories. Dequantization phenomenon occurs
when CP is broken either explicitly or effectively, and, as a result, pure
magnetic black holes are not possible. Two examples illustrating this
phenomenon are discussed. One is the electric charge induced by the neutral
pion field in a magnetically charged black hole, and another is the electric
charge induced due to the massive spin-two field emerging from possible higher
curvature terms.
