Maybe it’s a stretch to believe that Naomi, who has been working as a prostitute for some months, is unfamiliar with menstruation. However, the creators of this Mexican comic, “Street Sisters,” want to remind us of the back story they’ve estabished for her: that she left home while still in elementary school, was sexually abused as a child, and lived on the streets for years, friendless until she met Talia. It is possible that her spotty education didn’t include a conversation — never mind a class — about human reproduction. This could create further problems. Follow me to keep reading this comic as I translate it, or read it from the beginning on Imgur.