I was wondering how much of the mental anguish caused by statutory rape is a function of societal norms.
As such, I figured that at some point women likely were having sex when they first began to menstruate (correct that assumption if I'm wrong). Was there any evidence this had adverse effects on the mental health of those women?
Margaret Beaufort, the mother of King Henry VII of England, is a good example. She married Edmund Tudor in 1455 when she was just 12 years old. Despite her young age, her husband consummated the marriage and at 13 years old, she gave birth to the future King Henry VII. When Edmund died she remarried twice. First to Sir Henry Stafford and finally to Thomas Stanley, the then Earl of Derby.
This list of marriages is important to answering your question because upon her marriage to Thomas Stanley, she is said to have taken a vow of celibacy and lived apart from her husband. John Fisher, the Bishop of Rochester wrote: "Long time before that he (Lord Stanley) died, she obtained of him licence, and promised to live chaste, in the hands of the reverend father my Lord of London, which promise she renewed, after her husband's death, into my hands again"
Evidence strongly suggests that she did this in order to live a more pious life. While this may not completely answer your question, it does give you a basis for more in depth research on how sex may have altered Lady Margaret's mindset as she grew up.