Why is it Always About Daddy?

Maya has taken to calling me "daddy". I would be upset but she's so darn cute when she says it. I honestly think she thinks she's saying "mommy". She responds if someone asks "where's mommy?" But she still says "daddy" enthusiastically as she pats my face. She also calls my husband "daddy". Maybe she thinks everyone is called "daddy"? She also says "doggie". Hm...maybe I should be grateful she doesn't call me that.