Ah. I assumed it was because you had a Honda.My mates had a habit of naming me "Captain <insert job name here>" depending on where I worked. I originally worked at a supermarket called Woodies on Wandall, and my mates started calling me Captain Woody, to which many penis jokes were made. I started working for Civic Video, a video store chain in Australia (don't know about America), so Captain Civic was inevitable. I was at that store for nearly 4 years, and so I had that name for so long that it stuck.
In case anyone's curious, I explained my user name here.