FGM is used to
Ensure a female's virginity & fidelity, more so w infibulation (external tissues are sewn together).
Some consider female genitalia
disgusting or ugly & fgm is seen as improving esthetics & enhancing purity. Some men find sex
with infibulation more stimulating -although it can be horrifically painful for the female. In some cultures females are viewed as un-marriageable w/o fgm & off-spring of >.