Among ancient peoples, cutting has it’s origins in Africa. There was the northern area around Egypt, who spread it to Semitic peoples, and it was also practiced among the Niger–Congo language group which at this point is all over Africa except the northern part.
It was a manhood initiation ceremony to prove you’re a tough warrior. It wasn’t practiced on infants. It was a painful and dangerous body modification ritual to prove you’re a man. Pretty much it. Judaism introduced the idea it was directed by God, which has been heavily debated within Judaism itself).
Later the 1st century Jewish author Philo Judaeus (20 BC-50 AD) argued it on health grounds including the idea that foreskins block semen so cutting it off would increase the population, that it should be performed on infants because men wouldn’t do it of their own free will, and that it was an effective means of reducing sexual pleasure, thought to be a superfluous pleasure.
The Jewish philosopher Maimonides(1135–1204) insisted that faith should be the only reason for circumcision, reinforced the idea it reduces pleasure (and it must have if they kept doing it for 1000 years, right?), added that it weakens the penis thereby reducing lustful thoughts, and warned that women who have sex with uncut guys get stuck and can’t separate. Like dogs I guess.
A later disciple of his, Isaac ben Yediah added in the 13th century that it also reduces pleasure on the woman’s side, because women have orgasms with uncut guys and with cut guys they get no pleasure or orgasms because of the “heat and fire within them” from cut guys.
If it seems I’m nefariously focusing on Jews, it should be noted in Europe Jews were practically the only cutters. The Catholic Church declared it a mortal sin and Christians in general found it a horrible practice. Not much to talk about there. Europeans didn’t die out from penis cancer and sexual pleasure.
Skipping ahead to more recent times, 19th cent, cutting, while being explicitly identified and described as a Jewish religous ritual, begins to become thought of as medically necessary foremost, and religiously secondarily. Medical reason you say?
Masturbatory Insanity! Christian doctors considered it a sin already, but now cutting was good for: “hernia, bladder infections, kidney stones, insomnia, chronic indigestion, rheumatism, epilepsy, asthma, bedwetting, Bright’s disease, erectile dysfunction, syphilis, insanity, and skin cancer.”
Cutting was good for what ails you. Oh, and clitoridectomies were also performed on women for the same masturbatory (am I using that right?) medical reasons it was performed on boys.
Around the 1920’s preventative cutting starting having problems with advancing medical science and understanding of disease.
After that, cutting drops way off, and it’s proponents start feeling threatened. More and more medical associations in Europe, the world and even here in the US reject it as unnecessary. Various government health plans stop paying for it.
Now the cutters are feeling threatened and cornered so among other things they cling to a study claiming cutting African men is a cost-effective way of reducing HIV which is a ridiculous and unethical easy-to-grasp soundbite that makes little if any sense and has nothing to do with American newborns.
In short, it’s all about religion and penis phobia (masturbatory insanity).