The inner bands of the foreskin are the most sexually sensitive part of the body.
A friend had it done in his early 20's, he said that sexual pleasure was half deadened and only about 50% as pleasurable it was before the operation. There is absolutely no need to remove the most sexually sensitive part of a male's body.
Leave him be.
Hey, he can always do it later if he wishes, right. Someone else robbing him of this for life, nah.