Quoting KNZ.:" This isn't a debate, really just questions for people who were against circ'ing their sons. and not ... [snip!] ... i'm just at the point where it's not even a discussion to have. Any advice on how you dealt with this would be appreciated."
Before we knew this baby was a girl, I worried about making the right choice for my potential son. I wound up leaving the decision to DH because he is male and I am not. I felt it was a decision that he could have better insight on than I ever could since I've never had a penis or had to be 100% responsible for one.
BUT!!! It's a little different for my DH than most people's SO's. The reason is the DH was NOT circumcised as a baby. However, he got an infection at the age of 6 and had to be circumcised at that point. Because of this, he was 100% for our son getting circumcised. I felt confident in his decision on this because he had experienced it both ways.
The fact that your SO wants it done for cosmetic reasons...what does he mean? It's just because he thinks it looks better? If that's the case, ask him if he'd allow his son to get plastic surgery at a few months old to fix a crooked nose...just so he looks better. PM the same thing. If it's for other reasons...like his beliefs in cleanliness or whatever...then I would be more understanding.
Again...it's something that I worried about, but felt comfortable with the decision being DH's...as long as it was for viable reasons. But not everyone feels that same way.