We talk a lot about how male Twi'leks have ears while female Twi'leks have ear cones, but can we talk a little more about how only female Twi'leks have eyebrows??
And yeah, they're obviously painted on, because Twi'leks can't grow hair, but they start their make-up young:
How did this tradition start? Why, culturally, did they decide that women should mimic haired species, but only in this one specific way? Do some female Twi'leks refuse, as a gesture of teenaged rebellion and a rejection of human supremacy? I just wonder these things.