Car seats back then were plush! And no bucket seats yet so your girlfriend could snuggle right up to you while you were driving.
Here's a Jack Jones New Yorker commercial that only aired during the 1975 World Series. Red Sox vs the Reds.
Yes, seats back then were great for the drive-in. Seems like most vehicles, pick-up trucks included, have a center console now. Bench seats went the way of rotary phones and vinyl records. Kids now don't know what they missed.
And then when you inevitably hit something, your snuggled-up girlfriend would hit the dash, or worse go through the windshield. No thanks; this song was written about it - I’ll link the original and not the better cover by Pearl Jam because you appear to be of the ‘older is better’ set.
https://www.youtube.com/watch?v=lYi0NjS1JWU
I mean, if you hate your girl, sure, that’s one thing to have...
My first car had bench seats and they were OK until I met my wife. I was 6'2" tall with a 35" inseam and my wife was 5'2" tall. She tried to drive on a long trip but I had to sit in the back because she had that bench seat up so far I couldn't fit.
From then on I had to do all the driving until I bought my second car with bucket seats.