It's not controversial to say that women differ sexually, right? For example, some women can orgasm from penetration alone, and others need more-direct clitoral stimulation. Everybody knows this, or should know this.
Would it be controversial to claim that, hey, perhaps men differ, too? What if we're not exaggerating how much of a difference it makes? There are intact men right here in this discussion who say that most of their sensation comes from their foreskin, and they don't feel much from their glans. It would destroy their enjoyment of sex to cut it off, even while many men wouldn't notice much change, because most of their sensation comes from the glans.
And then there are people who envision all brown-skinned people as performing FGM with a piece of broken glass in a grass hut, when in fact, most instances of it are also hospital-performed medical procedures.