Why are some girls so trashy these days?

[CoachT]

Why do some girls think they get to decide what is socially "trashy" and what isn't?

Is it really "trashy" to be sexual or is that biologically influenced behavior that someone (men?) in society decided is trashy? Basic manners? Who decides what's polite and what isn't? "Cursing like men...", I thought women have been saying for just about 100 years that they should be allowed all of the privileges of men - how then, is that trashy?

The reason that "some girls are so trashy these days" is because some other people observe their behaviors and declare them to be trashy. They remain "trashy" until those people making the declaration decide to engage in the same behaviors (let's be wholly honest - very few people die as adult virgins, never dress "naughty" for their SO, never curse, and are never rude to someone) themselves - at which time it's not so "trashy" anymore.

So:
* Promiscuity? First, we can't define a number of partners that delineates promiscuous - therefor, it's nearly entirely biological drive.
* Way they dress? That's a social function that serves social purposes. It is to impress others, be part of a group, attract a mate, etc... It too then has a biological (fittest survival) function.
* Manners? That assumes that we all have the same idea of what is and is not polite. Some people don't agree. That's a social function and a matter of how you've learned to behave. What do you really think of a HS student that calls teachers "sir" and "ma'am" -- that is the correct manners. Make fun of him, don't you?
* Loud and rude? See manners.
* Cursing like men? Men are allowed to curse and women aren't? Who made that rule? Then again, what exactly is cursing and who decides? Again, social group membership function coupled with learned/habituated behavior.

A better question might be "why do some people judge others so harshly when they aren't exactly models of virtue themselves?"