Disclaimer: I’m from BY and I love tznius.
Re not being aware of boys: Until I started dating I had no idea that clothes had any effect on boys.I don’t have older brothers and in BY no one even mentioned Shomer Negiah.
I knew it was theoretically true that the reason we kept tznius, was so that boys shouldn’t do aveiros, but practically speaking this meant nothing to me. So the temptation came as a shock.
Fortunately I understood it and was able to deal with it. But I wish we were taught to value ourselves more. I now work in a non-orthodox environment and every day I understand tznius more and more. I think that our boys respect their wives more, and are more likely to commit to marriage, so we are not taken advantage of, and that our innocence and focus on the spiritual aspect of marriage is a beautiful thing. If only all my friends appreciated what we have.