The first time I observed a newborn boy being circumcised, I almost fainted. Since then, I've probably assisted with over 100 of these procedures. I'm not fond of the procedure, even with local anaesthetic and oral pain control medications, as well as a sterile environment and instruments, every single baby is traumatized by the experience in one way or another.
When parents ask me about circumcision for their son, I talk about what we are learning about the function of the foreskin. It serves a similar purpose for the glans penis as the eyelids serve for the eyeball. Without eyelids (or eyelids that are paralyzed by a stroke) the cornea becomes dry and scarred (keratinized), and results in damage to the eye. The foreskin keeps the glans from becoming keratinized, thus allowing it to retain its sensitivity during sexual experiences. That's not to say that circumcision ruins *all* the fun or even diminishes it noticably - I wouldn't know that because I don't have the equipment - but I suspect that circumcised men enjoy sex just as much as their intact counterparts.
Female Genital Mutilation (FGM, aka female "circumcision") as practiced in Africa is a far cry from the mere removal of foreskin. There are several "levels" of FGM that are practiced, depending on local custom. The most extreme involves removal of labia majora, labia minora and clitoris and then suturing the vagina closed, leaving a small opening for the passage of urine and menstrual blood. This is done when a girl is about 8 years of age, and often she is tricked by her relatives to go visit an "auntie" for a special party in her honour. The girl is held down on a bench or a table and the "auntie" has helpers to hold the girl's legs open so she can start cutting. There are no provisions for cleanliness, and sometimes the girl is cut with the same kitchen knife that was used to butcher the chicken that was cooked for dinner, or with a broken piece of glass. The girl is not given anything for the pain. When the 'procedure' is completed, her legs are bound together and she must lay still for several days lest the wounds open up and she bleeds profusely. She may develop an infection due to the unsanitary nature of the makeshift operating table and the utensils used to cut her.
I've looked after some of these women after they have delivered a baby, and it's absolutely horrible to see the mess that's been made of their genitalia.
You just can't compare this devastation to male circumcision.
That being said, I see absolutely no reason for the practice of circumcising infant males to continue. If an adult male wishes to make that modification to his body, that should be *his* right, it should not be for the parents to impose their cosmetic or religious peculiarities on their child.