Yes.
You tell him that circumcision without medical necessity is genital mutilation, no matter how fashionable it is. It's the circumcised ones that are deformed, not his.
And anyone who claims hygiene requires it, probably doesn't wash his armpits either. If pulling back a foreskin in the shower is too much effort, lifting an arm must be impossible to do.
I am circumcised, born in an era where most did not think twice about it. My son is not, because my wife and I actually research and think about these things and we could find no good reason for us to do it.
The woman by the pool shared her art ... and so much more.
Lucy's Body of Art - Wherefore Art Thou comp entry