We would have had this same struggle had we not have had girls. (I was actually praying for girls for this very reason!)

After I sent him all this I told him I was against it, but being the Dad I decided it was his decision (not something everyone would agree with but that's my thinking). I told him that after reading it all and giving it serious thought and consideration if it was STILL important for him to have it done then HE could take our son and stay with him through the procedure, I couldn't bear to witness it.
This is pretty much how I felt too. If after weighing up all the info he was still all for it then it would be his responsibility. He would have to take the baby, stay with him, pay for it, organise it, everything.

Good luck. How stressful for you.