The problem was everything had to go through a processing lab. These were either legit and wouldn't touch porn with a barge pole, so unless there was a chance of finding a night watchman to undertake the work. The labs were very undercover and illegal. I never knew where they were and I doubt many did. Even with the police in the pay of the porn shop owners, there was always the fear of a police raiding and the shutting down of production.
This also applied to the studios. I worked, as a model, in some very grotty places or in the early morning in strip clubs that were set up as studios before they opened for business. Or the occasional flat rented for the day, the problem was moving in the lights and the bright lights showing through windows. We worked under Tungsten or daylight.
There were few professional models, the stigma attached to being a porn model was personal rather than Society condemning them. Society would never find out.
This was considered outrageous by many.
This to be the absolute limit of acceptability and only available in a few high street shops.
And this could, in theory, put people into prison, but usually ended with a fine.
Today no one bats an eyelid at this on our TVs.
Well not here in Europe. And it seems every US TV show has to have a sex scene in it, even if it has no point in the show. Tap in
Online Porn into Google and all this come up.
Supplying the demand was the hardest part of the porn industry in the 1960s to mid-70s in most of the UK and many parts of Europe. Then like now, getting traffic was the easy part. The difference was then we sold 1-2. People browsing always ended up buying.