This statement isn't stupid at all, because it's true. Why else do you think cutting the foreskin is a religious rite? It's original purpose was to tame the male sexual craving.
The US is the most populous industrialized country where circumcision became a routine hospital procedure following birth, beginning around 1900. It was not done for religious purposes, since most of the population was and is Christian, and circumcision is not a Christian religious requirement.
Circumcision became widespread in the US primarily because of quack science that claimed male masturbation would lead to insanity, homosexuality, loss of "vigor", laziness, lowered fertility, and all kinds of other maladies. Removing the foreskin was believed to reduce ease of masturbation, and pleasure, and so in turn lessen the desire to perform this harmful act. For this same reason coarse woolen mittens were marketed for young boys to wear in bed, so they wouldn't touch themselves at night.
There were also concerns about disease prevention, following the relatively new attention to germ prevention, for both men and their women sex partners. A circumcised penis was considered more sanitary.