I grew up in the 80's in Portugal in a smallish city (~80k population) and back then sexual relations between kids and adults was pretty common

When I was 13 years old me and my best friend would mess around with his 18 year old cousin every time she came back on break from uni, she would jerk us off and we would take turns going down on her. I knew a lot of girls around my age at that time that were regularly hooking up with older men, usually school teachers or musical teachers. No one seemed to care, it was accepted socially. We would also often go to the nude beach and jerk off looking at naked women who would just smile back. When I was 15 I had penetrative sex for the first time with my other friends older sister who was 21 at the time. The first time I had a girlfriend around my age was when we were both 17 and a few months in I found out that she was also having sex with a police officer from our neighborhood who was married and in his 40's. Portugal was a weird place back then, during the 80's 90's it felt like everybody aged 12 was just constantly fucking and messing around with each other and there were almost no barriers/limitations/taboos. There was also so much CP, bestiality, porn magazines floating around back then that we would collect as teenagers. Stuff you could never find nowadays on the internet.