My sex ed was almost 30 years ago at 10 years of age and further education in health class at 16. All of it (both elementary and high school) was very mechanical. Nothing about actual sex was spoken about aside from how to avoid STDs and simple stuff like sperm meets egg. It was all anatomy and what puberty does.
I'm really not sure what you're trying to expand it to would've really fit without turning it into a proper course. We only had half a day in 5th grade to cover it and the teachers very clearly didn't want to do it, but knew they had to. As for health class, it would've been nice to have been expanded upon, but I'm not really mad about it. It is what it is. I'm sure I wouldn't've wanted my older, surly PE teacher teaching me about love and romance. I would've felt all levels of disgusting if that occurred. In fact, that's probably one of the reasons (aside from it not being part of common thought back then) they didn't teach it. For some reason, my district had an issue with pedophiles becoming teachers.