Male circumcision arose in different cultures probably for different reasons. It may have been for hygienic reasons; but in the earliest references (e.g. Egypt), it was sign of manliness. Among the Masai, male circumcision is considered an act of bravery, performed at puberty with the entire community watching.
I have also read that it may have originally been a matriarchal ritual, as a sacrifice to the goddess. The practical benefit here is that it makes men less sensitive and more able to have sex longer - thus having a greater chance at pleasing the woman. Later, as the patriarchy arose, female circumcision arose as a reactive practice, sort of a "fuck you" to the feminine principal.* Matriarchal influences are very clear in the mid-East, and relatively recent, e.g. the Ka'ba was originally a pagan temple. But as to the true origin of circumcision, I don't think anybody knows. And, being circumcised myself, I can't say how much more difficult for uncut men to not experience premature ejaculation. It must take some work, but I would have liked to have the chance.
Still happy, however, that I never circumcised my boys, regardless of whatever the stats say on disease risk and circumcision. After raising them these last 19 years, all foreskin issues we ever encountered were easily addressed by doing a "penis soak". To do this, prepare a salt water solution in a glass of warm water, and even, better add an antimicrobial herb such as goldenseal (10% v/v). If your uncircumcised sons ever complain of irritation, burning, redness etc., just make up the previous solution and have them stick their dick in it. Let it soak for 10 minutes, 2-3 times a day. Like wiping your bum, the foreskin needs to be maintained. No need to cut, just learn how to take care of your body!

*Although I am being crass, there are many examples of reactive changes within cultures, for e.g. Nepal, some tribal groups make their women give birth and care for her newborn with the farm animals for the first 40 days, because she is considered ritually impure and cannot enter the house... but this is completely backwards when one references their more ancient, forgotten practices, i.e. that the mom/newborn should be protected for the first 40 days, and kept away from impurities.