I'd probably wear my hair "down" a lot more if my husband volunteered to dry it and pin it back for me while, say, I put on makeup or something. I have far too much of a tendency to put it in a ponytail because I don't feel like pinning it back so I can wear it down (I have super thick, frizzy hair, so wearing it down without being pulled back is a no-go).
I think the relevancy of the legalities of cutting hair, or the fact that foster parents need permission, is that hair is considered to be part of the body to the degree that the state considers it something that only the person herself or her guardian parent can decide what to do with it and make permanent changes to it. Man, though, that must be really annoying for foster parents who have kids who were taken from unwilling parents who refuse permission just to hold on to every bit of control they can. Then you're stuck with all the hair care but you have no say in how the hair is cut, forcing you to deal with uncut bangs or untrimmed ends, or in the reverse, with a really short haircut that requires lots of styling and the kid hates, or whatever.