It's going to a woman so if it's emotionally charged I think it could work better. Tried what I thought were the basic ones but it all falls back to "daddy is and wants him to look like him" and "I knew a guy who wasn't and he was embarrassed in high school. Very dumb reasons, I know.
Stephan Molyneux has a good video on the psychological damage circumcision can cause to a baby.
You have to remember a baby can't cope with pain the way we can as adults. You are literally choosing to perform surgery on one of the most sensitive body parts and remove an important part of its function. And when you choose to do this you are choosing to inflict massive pain on an infant. It doesn't matter if the baby won't consciously remember it as that justification can be used for physical abuse of a baby.
Why not flay his finger? Or cut off a joint? Why not cut off an ear or the tip of his nose? Just because one practice is culturally accepted in no way makes it a moral good. We all agree female circumcision is barbaric and it is performed for similar reasons with similar results.
There can be complications with the penis that can be addressed later in life. Those complications might require a minor circumcision but at that point it is addressing a real problem. No different than an appendectomy.
And finally, if your justification is aesthetic, go rope yourself you porn addled faggot.