I was a side seater (passenger), top and bottom. Yeah, back in the day back seats were much bigger, but I wasn't quite of driving age at the time. Nowadays, it'd be a struggle even in the front passenger. You have to be an elf to be a backseat banger these days.
Now that I'm old enough and have a job and is too tall, it's just much mo' comfortable to get a room.
But maybe if I had an old school Chevy...