Both of the lead singers have been physically and sexually abused by their fathers, giving them some common ground. The "Dark" she knows well is the evil in humanity, and it is quite disturbing how she already knows of it, but it just furthers the motif of this piece that adults are often much worse than teenagers. When they start speaking in third person to no one in particular (It's just you and me. Child, you're a beauty) they are referring to how their fathers and other adult figures attempt to sweet talk them to fulfill their own lust.
Both of the lead singers have been physically and sexually abused by their fathers, giving them some common ground. The "Dark" she knows well is the evil in humanity, and it is quite disturbing how she already knows of it, but it just furthers the motif of this piece that adults are often much worse than teenagers. When they start speaking in third person to no one in particular (It's just you and me. Child, you're a beauty) they are referring to how their fathers and other adult figures attempt to sweet talk them to fulfill their own lust.