When a guy lets you drive his car what does that mean if anything?

Anonymous
When a guy tosses his keys to you and says you can drive my car (Denali) - is he trying to impress you, show off or just being nice?

We are close friends and drove separate to a restaurant and then we were heading back to his house. So he tossed his keys to me and said I could drive his car and he drove my car.
When a guy lets you drive his car what does that mean if anything?
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