Thinking about my wife and my "girlfriend" to be, I'd say they'd have a lot in common.
1. They are both beautiful
2. They both "need" accessories to look "nicer"
3. They both need constant care and attention
4. They're costly to maintain
5. I've waited almost as long for the Camaro as I did for the wife
6. They need to look their best all the time
So, for me, it's a female.