Because Sometimes More is More
If I was your dad, and was faced with the decision to cut off your little clitoral hood, I wouldn’t do it. I wouldn’t do it even if I was promised the same secondary health benefits that are associated with circumcision, or if all the other parents were doing it, or if I had never seen a clitoral hood in my life, and thus didn’t yet know how to properly care for one.
I wouldn’t do it because I wouldn’t want to subject you to a painful and risky surgery if there was any way to avoid it—especially this early in your life. I wouldn’t do it because the primary role of your sexual organs is to provide you with sexual exploration and fulfillment—both alone or with a partner—and this function is way too precious to jeopardize. I wouldn’t do it because you deserve better than to have a prominent scar on your genitals for the rest of your life. I wouldn’t do it because even a seemingly minor genital alteration can have a dramatic impact on one’s sex life. I wouldn’t do it because it’s too important a decision to leave out of your hands.
I not only wouldn’t do it, I would do everything in my power to protect you from it. Even if your mother had the same thing done to her and thought it was harmless or even preferable, I would do my best to convince her that you deserve better. But I guess that’s just me.