I had this exact problem when we found out this one was a boy.

DH is done, and wanted his son to be done for all the reasons you mentioned (tradition, cleanliness)... because he was done and everyone else was when he was growing up he just figured that was the thing to do.

So, I emailed him loads of legitimate circumcision research, plus pictures and information on the procedures. I sent him the statistics of boys getting it done nowadays, and also the statistics of UTI's in boys. I sent him the statistics of problems occurred from circumcision which far outweighed the infection ones. I also sent him the costs involved and the availability of Dr's willing to do it in our area., which didn't hurt my case at all. I actually tried to avoid all articles that were extremely biased against it (there are heaps online), because I figure the statistics really do speak for themselves and I didn't want to seem like I was shoving my opinions down his throat... I wanted him to reach the same conclusion as I did based on the infomation given.

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.

DH spent a few days looking through it all, doing his own research and has completely changed his mind on it.... we're not having our son done. Hope that helped!