We already have enough on our L-plate, thanks very much
Some of the strangest people I have met in my life have been driving instructors. To which you would probably respond that this may be related in some way to the fact that they were sitting beside me at the time, trying to instruct me.
But there's more to it than that, I'm sure. They were strange already, and they couldn't help showing it in some way. There was one who for some inexplicable reason kept referring to petrol as "gaws" (not "gas", but "gaws").
There was another who spoke movingly to me about his fierce hatred of the testers with their easy civil service lives.