I don't want to leave the discussion without offering some hope and positivity to circumcised males who may have read here and are thinking FUCK. If you google "foreskin restoration", there are many resources available. It is not technically full restoration, the specialized tissues and structures that were amputated cannot grow back, but you can grow enough skin to cover the glans, which will restore much of the sensitivity there. The extra skin also mimics the function of the foreskin enough that gentler sex is possible and masturbation easier (some circumcised men cannot even masturbate without artificial lubrication).
The process takes a long time though, progress is measured in millimeters over months and years. But it does work. Men have gone from not having enough skin to accommodate an erection, to full coverage of the glans when flaccid. So search if you're interested, and if you have further questions feel free to ask me here or in PM. Also for people who agree that circumcision is wrong, I encourage you to speak to others about it, especially those considering doing it to their sons. The boy can always be circumcised later on in life, but once it is done it can never be undone. He has the right to make that decision for himself.