Imagine if your fingernails were surgically removed as an infant [without your consent] for religious or precautionary measures or with the only excuse being 'this way your mangled little fingers will look just like Daddy's!'
Leave it to humans to think they can perfect on Mother Nature. Like anything else in the natural world, we can only fuck things up.
I've had a few girlfriends over the years, not like Brandon Bieble numbers, but enough for the sake of this conversation, and I can't remember a single one that wasn't head over heals goo goo for ga ga bent out of shape obsessed with this intact dick. Some of said dick's most recent admirers have even spoken up and said 'Your dick is literally perfect, and I'm so glad your not circumcised.'
Turns, out, upon further inquiry, the foreskin is one of the few things seperating the human penis from the rubber dildo. From the woman's perspective it creates a much more dynamic experience, with a lot more going on than the one dimensional piston/plunger experience that Johny Lollipop can offer. The foreskin also plays an important role in keeping a womans natural lubrication in place, which would have been huge 100 years ago in a world without petroleum based KY jelly. Hell that's still huge.
Performance / sensitivity wise, having an intact penis does not make you a one-pump-chump. Nor does a gentle breeze make you week in the knees. If anything, it allows for more sex, with the ability to have more orgasims before chafing you or your parter into discomfort. Most importantly it will be more pleasurable for both parties because A) you still have normal sensation in your penis and B) your penis is mechanically behaving the way nature intended inside a vagina that nature also designed.
I also love the excuse that it 'looks better' to have a mangled Neopalitan Ice Cream dick, with an unusually tan shaft, inch or so of white, sensationles scar tissue topped off my an angry red, chafed, dried out tip. Yeah that looks totally normal.
Last example I will leave you with is look at literally any other mammal. You've seen a dogs dick right? Now imagine circumcising a dog so that it's little red rocket is forever exposed. How absolutely fucked and mangled that poor dogs dick would be after like one week of being exposed to sun, rocks, dirt and insects. Humans are so abysmally detatched from nature and theres no better way to declare it than circumcising your own children [without their consent].