It does sound like she needs extra guidance and encouragement to keep herself chaste, and to respect her body more, and cause others to also? Yes, there are topics parents forget when they have that talk, which should begin early, and continue building through marriage imo!

Please do talk WITH her...not at her... then, if you make new rules, be sure to write them down, and ALSO agree to the consequences for breaking the rules. If you keep her in on this, then it won't be you who is the ogre, but her choice for breaking a rule or keeping it..and she will already know the consequence. It's a good way to help them learn how the real world operates too, imo. Good wishes!