Sex ed was ~14 years ago for me (bloody hell it doesn't feel that long), UK based if that makes any difference. In the UK, at least when I was at school, you had non-mandatory sex ed in year 5 (9/10 years old) but for my class our teacher decided not to teach it to us as they had the choice within the curriculum, and then mandatory sex ed in year 7 (11/12 years old). I didn't notice at all that I was going through a different experience to my peers. I was a late developer, and came from a house where sex, dating, etc weren't even mentioned, so I felt quite uncomfortable with the topic. It didn't occur to me that my experience was unusual because I avoided conversations around sex, and my friends didn't bring it up too much (we were only 11/12). The time things became a bit more apparent was when we were about 14/15 and my friends would have whole discussions about who was "hot" which obviously meant little to me, but I went along with it assuming I was