Your sexual preference for circumcised penises aside, the genitals you chose to have cosmetically, functionally, permanently and surgically altered belong to your son. He may grow up to have preferences different from yours. His future lovers may have preferences different from yours. Your husband's preference differed from yours. As a woman who has been fortunate to have both intact and circumcised lovers, I can assure you that my preferences differ from yours.For the rest of the story, see Dr. Momma. If you are in the Houston area and want to know more about circumcision education, request to 'check out' my Circumcision Packet from the lending library.
Key men in my life would also beg to differ; my partner thanked his mother for "letting him keep" his foreskin. My brother wishes that our parents had told the doctor to leave his alone. It pains me to think about how different his introduction to life outside the womb was from mine, and how I got to keep the body I was born with, but he did not. Circumcised boys will never know what it's like to have a whole sex organ. They will never experience the full range of pleasure they were meant to have, and are likely to lose sensation as they age. Countries with lower rates of circumcision have lower rates of ED. The sensitive glans, meant to be an internal organ and protected by the foreskin, grows calloused from years of rubbing against fabric, and the most sensitive areas of the penis, such as the frenulum, are amputated in circumcision.
As for wanting your son to fit in, a significant percentage of parents are now choosing to "bring their whole baby home," which means many of your son's peers will be au naturale. The stigma around having one's whole penis is fading - as well it should! Why should human bodies in their natural form garner distaste?
As for sexual health (which should be a non-issue for babies and little boys) I recommend that you examine the studies that show that the incidence of sexually transmitted infections is lower in circumcised men. The statistical methodology is flawed. In fact, the rates of HIV infection are higher in the United States, where more sexually active men are cut than in similarly developed regions where intact men are the majority, such as in Europe.