Um, DSD (14 y.o.) here, but would be NOT ok with the situation. You are not crazy, I also believe that it is not appropriate.
I respect others' right to raise their kids whatever way they feel fit, but I don't think sign in along "it's their body - their decision" kind of mentality when they are only 14. No, I don't think 14 year old is the same as grown up, or they'd be working 40 hour work weeks, and living on their own, and having babies, and carrying household-full of responsibilities... thus far most of them just trying to pass 9th grade adn roll their eyes when you mention their cell phone bill or ask them if they can help out with taking out the trash...
I feel that it's parent's job to guide their kids, and there is nothing wrong in having your opinion voiced, setting rules and boundaries, or having a discussion with your child on this topic (the calmer you are - the better it is of course

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Just my humble opinion...

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