Old school: 16mm black and white film
The first proper job I had (1972) was at a small media company run by two brothers. Their old man had started the company years before but he died shortly before I joined.
One day some of the lads told me about his porn stash. Apparently the brothers had to raid his loft and retrieve said collection before their newly widowed mum had a chance to look up there. The boxes of 16mm black and white smut were taken back to base and kept in a cupboard in the workshop.
Much of it had deteriorated and just fell apart as it went through the gate but they rescued as much as possible and edited it into one reel. It was more of a comedy when they had finished. Shots zoomed into "certain areas" and when it pulled back it was a different two (or three or four) people.
It was proper vintage porn. Normal shaped people and no deforestation. And talking of trees, those buzzy plastic toys you see today were then made of carved and polished pine. Seriously old school. Adds new meaning to "got wood?"