Is it just me or girls getting sluttier?

My friends always call my friend's sister hot and text her all the time asking her to come over in a bathing suit and stuff but she goes along with it. When my friend was telling her to stop her friend said "just because she gets IT doesn't mean you have to babysit her". She is a 7th grader. Is it just me or should 7th grade girls not be getting IT from guys?
Is it just me or girls getting sluttier?
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