To your butt!? Thats insane! I've never had my hair longer than half way down my back. It always gets too damaged for me to grow it particularly long. I don't know how people do it... it doesnt take me that long to do my hair but it seems like an eternity so I can only imagine what it'll be like for you
How long does your hair have to be in order to donate it? I only know one girl who donated about a foot and a half of hair.