Damn, when I responsed to this thread, I was a swinging bachelor.
Now i'm married. My wife could care less about cars. She once called me at a parking lot because she forgot what type of vehicle she drove (we had just bought it). I could tell her I drive a Ferrari and she wouldn't know the difference.
Honestly, that's the way I prefer it. She doesn't care what I do in the garage, or how much money I spend on the car, and I honestly could care less about picking up chicks with a 30 year old escort on steroids.