Allen Klein was an American businessman and author known for his work in the music industry. He served as a manager for various musicians, including the Beatles and the Rolling Stones. Klein's expertise in artist management and his influence on the music business made him a prominent figure in the industry.
This quote acknowledges that advertisers recognize the power of humor in creating a connection or attachment between consumers and their products. It suggests that humor is employed as a persuasive tool to enhance brand affinity, foster positive associations, and establish a rapport with potential customers.