Women may wear their hair short because it’s chic or easy to care for. And some guys favor long, sexy locks, a la Andrea Agassi — before he went bald.
But some women cut it short to express a more masculine sense of themselves. Just as some men — cross-dressers — don girlish wigs to bring out their feminine side.
So hair holds symbolic meaning: Long is feminine; it’s for girls. Short is masculine; it’s for boys.