No, i'm not making shit up, it happens in africa too. the procedure of flaying is really common and in a lot of tribes or even modern setting they flay the skin when they are teenagers as a "passage" to adulthood, it's just that there isn't any laws against it to catch the retards who do it unlike FGM (which needs more laws against the practice of flying to another country to do FGM in all of the states).
Even more to this, no, they lose their sensitivity and only ejaculation remains, something that is very minimal and it's reflected to that destroyed sexuality, even more when most FGM is more similar to removing the foreskin, where they can still orgasm but lose a lot of sexual function and suffer pains through it (being more difficult and being an abusive aspect which is undeniable).
The worst of FGM and MGM destroys all of orgasm and function, all MGM and FGM destroys sexual pleasure for reproduction, you need one for the other, for opening and making the destructive procedure of FGM, you need MGM to make the penis have the capacity to break these damaged parts, instead of functioning normally.
Both are made to decrease sexual pleasure specifically, they are destructive, just represent that reproductive and abusive aspect and cause more troubles, you can see this because men who have their foreskin left overs destroyed cannot orgasm and can only ejaculate, something that just exist to reproduce.
The only way to show the case is showing that they are mutual and that we should stop both, there isn't any other way because they work together to undermine anything related to these aspects, this is undeniable.