I think it is mostly done with anaesthetic, a local, administered via injection like my sons was. Have you never had dental work with a local, I've had minor surgery with a local and I never felt a thing.
That's all it is, a minor surgical procedure that will cause minimum discomfort for a few days. And it's not some crazy person that 'mutilates' our children, we paid a surgeon who specialises in circumcision, he's written books on it. That is usual, most parents pay £100-200 to have a doctor, GP, surgeon to do this 'barbaric' procedure.
Most people do not know what they are talking about wrt to the reality of a typical circumcision procedure, they watch some crazy YouTube video and take that as a point of reference. WHO recommend the procedure, I'm sure if you google, you could find their booklet promoting circumcision.
And for those of you so uppity on circumcision, I wonder if you take the same stance on formula feeding. You know, babies don't have a choice in that either, I'm sure given the choice they'd prefer their mothers milk, not some dead fake milk that gives them reflux and increased risk of gastroenteritis, chest infections, ear infections, general hospital admissions etc etc. Actually I'm 99.9% sure FF feeding carrys far more risk to a babies health than a properly performed circumcision.