You will just borrow a culture and believe whatever you were told because of lack of common Sense.
If the gear of your manual vehicle is malfunctioning, does it mean your motor can't move? No. You might be having smooth glide to gear 4 than gear 2.
So what it means is that a partial or total removal of clitoris can make you have uncontrollable levels of libido. The only truth about female circumcision(FGM) is, it makes sex difficult for those who practice a type of FGM called infibulation, where you have to narrow the vaginal orifice. Imagine a dick going through the size of a wedding ring.

Now let me reveal a secret that addresses the topic
infibulation, clitoridectomy were more acceptable forms of FGM during the Pharaonic era. The Egyptians believed in gods having Bisexual features. These features were believed to reflect upon the mortals, with women’s clitoris representing the masculine soul and men’s prepuce that of the feminine soul. So, circumcision was considered to be a marker of womanhood and a way to detach from her masculine soul.
As it became a socio-cultural norm, Female genital mutilation became the utmost criteria for women’s marriage, inheritance of property and social acceptance in ancient Egypt.

So it will be safe to say ladies who were circumcized will not orgasm before their male counterpart because they have lost the masculine part.

Conclusion.
FGM does not stop high sexual urge.
Infibulation can make sex dreadful
An uncircumcised Female can cum in split of seconds