Pre-VCR (1905 - c.1980)
Mainstream erotic films in the pre-VCR era
(1905 - c.1980)
In the pre-VCR era people had to physically visit a film theatre to watch an erotic film.
(1980 - today)
In the post-VCR era, beginning in in the mid eighties, it has been possible to watch erotic films in the privacy of one's living room.