Its a pernicious habit not just linked to Morgans. Our family Merc is the Panzerwagen. My wife's Smart Roadster is the Rollerskate. My Lotus was Lottie. And yes, the kids and the dog have nicknames too. As does the M-I_L but I wont repeat that one.

I cant help doing it.

There are some things that dont merit names. The F type never got one.