My Dad had a subscription as well. Late 70's early 80's. He kept them in the garage in a box labeled "Motor Trend".
One day a kid (Billy Green) from the neighborhood who was about 16 or so was watching me and my brothers while my parents were out for a couple hours. He disappeared so I went looking for him. I found him in the garage leaning up against the hood of my mothers car with a playboy in hand and the centerfold stretched out top to bottom. He didn't even try to hide what he was doing. He probably told me to scram and I never mentioned it to my folks.