There are a number of reasons that FGM might be carried out and these often vary depending on the part of the world the practice takes place. According the World Health organisation the following are cited as the most common reasons for performing FGM:
- Where FGM is a social convention (social norm), the social pressure to conform to what others do and have been doing, as well as the need to be accepted socially and the fear of being rejected by the community, are strong motivations to perpetuate the practice. In some communities, FGM is almost universally performed and unquestioned.
- FGM is often considered a necessary part of raising a girl, and a way to prepare her for adulthood and marriage.
- FGM is often motivated by beliefs about what is considered acceptable sexual behaviour. It aims to ensure premarital virginity and marital fidelity. FGM is in many communities believed to reduce a woman's libido and therefore believed to help her resist extramarital sexual acts. When a vaginal opening is covered or narrowed (Type 3), the fear of the pain of opening it, and the fear that this will be found out, is expected to further discourage extramarital sexual intercourse among women with this type of FGM.
- Where it is believed that being cut increases marriageability, FGM is more likely to be carried out.
- FGM is associated with cultural ideals of femininity and modesty, which include the notion that girls are clean and beautiful after removal of body parts that are considered unclean, unfeminine or male.
- Though no religious scripts prescribe the practice, practitioners often believe the practice has religious support.
- Religious leaders take varying positions with regard to FGM: some promote it, some consider it irrelevant to religion, and others contribute to its elimination.
- Local structures of power and authority, such as community leaders, religious leaders, circumcisers, and even some medical personnel can contribute to upholding the practice. Likewise, when informed, they can be effective advocates for abandonment of FGM.
- In most societies, where FGM is practiced, it is considered a cultural tradition, which is often used as an argument for its continuation.
- In some societies, recent adoption of the practice is linked to copying the traditions of neighbouring groups. Sometimes it has started as part of a wider religious or traditional revival movement.