Humor Urban legends about racism in humor. 2 Humor is all too often used as a vehicle for expressing racial prejudices. David Letterman authors “Top Ten” list about why there are no black Nascar drivers. The three things blacks fear most are dogs, ghosts, and registered mail. A house fire killed black and Mexican families but spared a white couple, who were the only ones at work when the blaze started. Disaster survivor gives mistaken answer to an interviewer’s question about the loss of churches in her area.