Why some girl friends act like this?

I am an honest person. I love to hang out with people like me.
I see bad friends together.. naughty girls squats.. religious groups.. but it isn't the case with me.
This happens a lot: girls accuse me of being wild or alcohol addict etc... and spread it everywhere and act like they are so innocent.
Later on I always find out that they are wilder and drink more than I do. They post it even in social media. They have affairs etc..
Perhaps they share this only with males?
Why some girl friends act like this?
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