I know I'm coming in late to this thread, but I only just stumbled upon it.
Thank you, Tetra, and Armoured, for persisting. It's been very refreshing and healing to read your posts. I'm embarrassed to say that I was also part of the purity culture and raised my children that way. I still have a young one, and have a beautiful relationship with that one because I now think and parent differently. I am trying to heal my relationships with my older children but I will have to live with the fact that the older children are damaged from the way they were raised.
It also dawned on me, as I read what your posts, that I was subjected to a lot of sexual abuse in my marriage, in spite of both my husband and I trying to stay pure before marriage and live "Biblical" lives after. Thank God He has delivered me from a dangerous marriage (although the abuse is chronic and never-ending, because we are both still involved in churches [albeit different ones], but he more so, to gain allies). What the church doesn't seem to get is that children continue to suffer, but that is going off topic now.
Back to the original topic, my experience is that having a lot of conventional teaching about sex before and in marriage did not prepare me for more important aspects of marriage, e.g. recognizing abuse. The church community I belonged to (a large one and influential one) prioritized and emphasized what I now to be unbiblical - patriarchal teaching about headship that included husbands "needing" sex, husbands being the head of the home, etc. And kids were taught stuff in youth group like the "sticky tape" object lesson about sex. But nothing about mutual respect, equality, or critical thinking. Doesn't make sense.