Abuse of our casual dress policy at work has led to the inevitable - a dress code. How can an intelligent young woman in her late 20s think that it is appropriate to show up for work braless in a midi top with extremely short shorts (her cheeks were hanging out) and in flip flops?
Then, despite warnings, a young man repeatedly showed up in plaid shorts and a t shirt with flip flops - both looked as if he had slept in them. His defense? THese cost a fortune.
So now all sandals for men are banned as are flip flops generally. No T shirts, no jeans, no too short skirts or midi tops.
Women must wear a skirt of appropriate length with a blouse or knit top, shoes or sandals. Men must wear khakis or slacks, shirts, shoes.
And we all have to invest in new clothes.

My point - they don't grow out of it. And don't expect parents to guide them. The parents are hopelessly dense about appropriate dress.