"God" tells man to "be fruitful and multiply." Then why does he instruct Abraham to murder one of his offspring, relenting only when the patriarch shows his willingness to actually do it, then insisting that all good Jews show their reverence through a "covenant": removal of the prepuce from the membrum virilis? Almost all of the male's sensitivity (and therefore his enjoyment of sexual congress) is located in the underside of the head of the phallus, and the purpose of the foreskin is to protect that sensitivity.
I haven't seen statistics, but I would be willing to bet that males with foreskins enjoy sex better, and certainly enjoy it longer, than men without. In fact, I am willing to wager that ninety-nine percent of all premature ejaculation occurs in men who are "cut" because the exposed head is constantly stimulated in such diurnal exercises as walking. (Cotton underwear is the worst!) It would seem to me that if "God" really wanted man to be fruitful and multiply, "He" would have let us keep our foreskins, the better to enjoy sex...unless, of course, he only wanted us to get on, go, and get off.
One more instance of "His" arbitrary, capricious, and downright cruel pronouncements, actually not the demands of some supernatural authority, but the deranged rantings of grumpy desert warlords of the 6th century b.c.e.