Yes, we do! My wife's nickname is ""Wilma" (ala Flintstones) and mine is "Fred" when I come home from work. When I'm working on my "hunny do" list, she calls me "Charles" (ala Little House on the Prairie) and I call her "Caroline" when she's cooking or cleaning. Sometimes we call each other "Hunny" and "Bunny" just because.
The happy chemicals in our brain are designed for particular jobs and randomly flow for no reason. Loretta Breuning, PhD, founder of explains what these neurochemicals are and how they impact our relationships.