I wasn't talking about hair? I feel like we're starting to mix appearance requirements with non-appearance presentation.
And I don't care about hair other than it would be considered "neat" in the culture it came from. Given the multicultural mix of where I work, people wear a wide variety of different hair styles including afros, turbans, beards, and marks on their forehead. Even worked with a non-federally recognized Native American engineer who wore his hair long in a ponytail.