Driving someone else's car - or, in different terms, driving another car than the one I'm used to - can be quite an experience. The difference's in the details. Even with the same type and model of a car. The first thing I notice is the smell. Then the hum of the engine. Different tone. And so on. The buttons and commands are basically the same, but the reactions could be a bit unpredictable. Unexpected. Intriguing.
In a sense, it's like going to bed with a stranger ;)