I believe very strongly in a person's right to bodily autonomy. Obviously, I believe in this up to the point where someone else's autonomy is affected--don't go punching or raping people, for example, but by all means, engage in silly dancing and eating what you like.
These views extend beyond abortion. I believe that pro-choice means more than just a woman's right to an abortion. I believe that it means a person has a right not to be abused, mutilated, or murdered. I believe that we should be able to be fat or thin without other people making it their business. I think that everyone, young and old, should be able to masturbate with a reasonable expectation of privacy. I believe that consenting adults should be able to engage in whatever sexual practices they like. But what I really want to talk about is this one: I also believe that it is wrong to surgically modify the genitals of male and female infants and children.
I have heard a number of arguments regarding circumcision, and none of them seem like a good enough reason to take a knife to the genitals of a person who cannot even speak, let alone consent. The stickiest (pardon the pun) argument I've seen so far, however, is the oft-repeated statistic about reduced HIV transmission among circumsized men. The reason it is sticky is because the numbers are there. If you are circumsized, you are less likely to contract HIV.
Now that I've admitted that point, however, I'd like to point out that it is well-known that HIV is pretty difficult to transmit, compared to many other infectious agents. Those who are transmitting it because they are uncircumsized could just as easily have prevented it by other means, such as wearing a condom, not engaging in penetrative sex, and limiting sex to partners who are already infected. I personally would not want to rely upon circumcision as the method for preventing myself from becoming infected with HIV. Remember, also, that the transmission is reduced, not eliminated by circumcision--unprotected sex is inherently risky with any partner.
Also, if you are pro-circumcision, and you give this as a reason for it, then I would suggest you not later on oppose the HPV vaccination on the grounds that HPV transmission can be stopped by behavior modification (in the form of abstinence, of course). It might make you look silly.