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Here are three powerful reasons why using humor attracts customers and helps communication. Knock Knock! Who’s there? Iowa.

Jen Bilik, founder of the stationery and gift business Knock Knock, considers herself the company's "creative monarch." Jen Bilik calls herself a productive procrastinator. She took time off from her work as a freelance book editor in 2002, intending to write an illustrated memoir about high school.