LONG HAIR DON'T CARE!
With the passage of the decades in XXth century the use of long hair for everybody has become something normal and as we arrived to the age of social media a lot of phrases like "good hair don't care" or "messy hair don't care" are very common. All of these derive from the famous phrase "Long hair don't care" but what is the meaning of that sentence, and most important its origins?
For that, we have to get back on time to the hippie movement. Those ideas flourishing and the young shout of peace had part of its representation in the long hair for men and women with a lot of criticism on part of the most conservative and prudish sectors of the society that associated it with a scattered life, so when this kind of people insulted someone's long hair the owner of the mane said "long hair don't care" meaning "I couldn't care less about your insults".
But their reasons to protest and to this breaking with the previous generation were serious, and the most serious of all them: life, a fight for survival in order to not to be sent to Vietnam with high possibilities of dying in combat in men's case or to loose your dearest persons (friend, son, boyfriend...) in case of every single person.
In old times men's long hair has been seen good on many cultures part and the lenght of what's long or short has been pretty subjective but since the IWW one thing was for sure, the cut hair responded to a necessity of the best hygiene possible under the impossibility to have good hygienic conditions while at war and the uniformation of the individuals so it seems only logical that hair, at the end of the 60s, was an important symbol to go against the war.
With the movement many artists and personalities appeared with long hair, long beards, naturals... Jimi Hendrix, Janis Joplin, Angela Davis... singers, actors, activists... some of them with spectacular dream hairstyles, and while they "didn't care about long hair" their manes were imitated for decades until our days in the most hydrated and well cared versions.
As for Barbie, she always followed the trend, and while in the beginning of the 70s her hair reflected pretty timidly the hippie movement the 90s saw the mane of Barbie grow to their feet for the children to comb until the hair became messy but... "messy hair don't care"