Parents need to know that there are a few dark images (corpses and pregnant terrorists, for example) sprinkled amid charming poetry and an experimental hodgepodge of sound effects. There are also subtle messages of female empowerment.
Positive messages:A subtle feminist message throughout ("Declare independence!/Don't let them do that to you!/Raise the flag!").
Violence:Some darkly poetic death imagery here and there ("What's the lesser of two evils:/If a suicide bomber/made to look pregnant/manages to kill her target/or not?").
Bjork's latest album since 2004's Medulla sees her return to a more conventional sounding pop album (by Bjork's standards). This charming experimental pop album is suitable for all ages.
The sexual innuendo described by the CSR ("Let's celebrate now all the flesh on our bones/let me push you up against me tightly") is not sexual at all. That quote is lifted from the song "I See Who You Are", which is a song about her daughter.
The only song which has any really outright negative characteristics is "Hope", the lyrics are hopelessly bad and have something about a suicide bomber, the whole song just isn't very good/inspiring in general.