When I was very little (six or seven) I wasn’t allowed to watch The Young Ones (I think because it had a lot of swearing?) but my older siblings watched it so much that I ended up seeing every episode about 20 times anyway, whenever my parents were out.
My mum was quite strict on violence in films when I was little, so I vaguely remember not being allowed to watch The Terminator when my sister rented the VHS tape, I would have been about nine then. Other than that I can’t remember ever being banned from watching stuff. If my parents were watching it and it was on the telly at a time when I wasn’t in bed, it was allowed. My parents didn’t watch soaps or anything, so that wasn’t really an issue.
Once I got to 12 or 13 I was allowed to watch whatever I wanted really. I had a TV in my room and a late bedtime.
Obviously no internet back then so porn etc wasn’t something I’d have had access to.