Complex sentence: FGM is often seen as a rite of passage that makes girls eligible for marriage, and is associated with cultural ideals of femininity and beauty, seen to rid girls of their "unclean" and "male" body parts.
Split into simpler sentences: FGM is often seen as a rite of passage that makes girls eligible for marriage. It is associated with cultural ideals of femininity and beauty, as it is seen to rid girls of their "unclean" and "male" body parts.