If I was going to buy a Shelby Ford Mustang, I'd want to know a lot about Mustangs and the history behind the Shelby. It's a car that people who know cars would ask me about and I should have answers.

I feel the same way about tartans. I wear a Stewart tartan and I took the time to learn something about the Stewarts and my familiy's relation to the Stewarts, in case someone asks -- and people have asked.