Sorry Baggins, but you are so defensive that it does sound like your circumcision has affected you quite badly, otherwise you would be able to contribute in a more effective and objective (and unoffensive) manner. I am being serious and not provocative here, but I do think you should reflect a bit more on how it has affected you and seek help if you feel you need it.
Circumcision does hurt infants, if it did not, I would be very concerned with regard to the infants ability to sense pain, which is a natural protective response, partucularly in an area filled with nerve endings.
FGM is carried out for cultural reasons - mainly based on the theory that it is more hygienic and therefore the person is cleaner in the eyes of religion, and we frown upon this. I do not see how male genital mutilation (with exception of valid medical reasons) is any different.
I have dated two men who were circumcised later in life and both did tell me that it affected sensitivity. This however is anecdote, not data (Baggins...note that anecdote does not equal data). One did have recurring infections down there after the procedure, so even as a consenting adult under medical supervision, it is not risk free.
The study referring to HIV has since been found to be exceptionally flawed and the findings overstated. This is a good article which links back to original studies and states the myths in a reader-friendly manner.
www.psychologytoday.com/blog/moral-landscapes/201109/more-circumcision-myths-you-may-believe-hygiene-and-stds
If you want a good source of unbiased, peer reviewed scientific studies, the Cochrane Library is the place to look online, not at anecdotes and sweeping generalisations from defensive internet users ;-)
To the original poster, you are lucky to have the insight that you have and to be querying this altogether shows that you are concerned about the procedure, and rightly so. You need to have a frank discussion with your partner and healthcare provider on this, as it is a highly emotive subject.
I certainly would not even entertain the idea unless there was a medical reason, and have little sympathy for the religious argument as I think it is a magnificent way of pretending to have no control over the situation, when actually its just quite a lazy way to be in a situation under which you are in control. What if your son, like you, converts later in life? He'll still be scarred by your decision.
As I said before, we are pushing to make female genital mutilation an imprisonable offence in the UK, and I see male genital mutilation no differently.
I hope you consider the facts before deciding. I do not doubt that you are in a dfficult position.