First sex in a car...

1962 Studebaker Lark---Back seat ...... flat floor.

As far as worst car that I have 'used'...1972 MG Midget- with a roll cage.

But it was worth every painful second.

My 68 Chevy van (windowless) was the best. I could park around the corner from her house (after telling her parents that we were double dating with another couple who was going to meet us there) and nobody was the wiser.
Never got caught.
I wonder why all my buddies wanted to swap cars on Saturday nite??