2 myths of women's sexuality:
1) First time of sexual intercourse is marked by bleeding
2) Hymen will break and be gone forever
The 2 women, Nina Dølvik Brochmann and Ellen Støkken Dahl, are medical students and authors of The Wonder Down Under, easily demyths the 2 centuries-old belief in their recent sexual education TED Talk: https://youtu.be/fBQnQTkhsq4
Briefly, turned out that hymens come at different shapes and sizes, i.e. stretchable, with small, many holes, or large holes in the middle, which makes it impossible to be a measure of women's virginity. How to make a measure out of something that is not a constant? If it is stretchable or sufficiently spacious to allow penis to penetrate through, it doesn't have to break and bleed, and remarked that a woman is still a virgin.
Medical professionals have known these for many centuries, but the myths are still prevalent in the societies. Why are these facts not highly publicized? Because it is being used to surpress women in certain cultures, i.e. honor killings, dishonoring the family for no longer being a virgin when marrying into another family (giving a 'used' daughter).
Personally, having seen how women close to me being discriminated based on these myths, them stepping up to demystify these truths, is very, very much appreciated.
Thank you both.