While we do not wish to push speculation too far, differences in the association between circumcision status and sexual practice across ethnic groups suggest that cultural, rather than physiological forces may be responsible. In particular, the presented results may reflect attitudes regarding the cultural acceptability of the uncircumcised penis. Note that the association of circumcision with experience of sexual practices is weakest among ethnic minorities for whom circumcision is less prevalent. Among whites by contrast, uncircumcised men are relatively uncommon. A consequence of this may be that a certain stigma is attached to the uncircumcised penis by the white population. If the uncircumcised penis assumes a somewhat negative cultural association among whites, this may lead uncircumcised men to engage in a somewhat less elaborated set of sexual practices.
The way I figured it, however, there are three reasonable explanations why an otherwise sane person would do such a thing. One, as in the case of former President George H. W. Bush, to save his life when his plane has been hit by enemy fire. Two, also as in the case of the ex-president, when one is winding down his life and figures he hasn't much of it left to lose anyway. And three, as in my own case, when one is not yet sufficiently mature to appreciate that his life is far too precious a thing to be thrown casually out of an open hatch at 3000 feet.
If, for example, it were found that removing parts of the vulva would reduce incidence of cancer of the vulva, then we would certainly not begin to think that removal of the vulva may be a healthy option.
In fact, it would be considered absurd to even investigate the possible benefits of such a procedure. Such research would never be funded here.
Karmakaze, you realize that breasts are considered secondary sexual characteristics, correct, and aren't analogous to primary sexual characteristics, i.e., genatalia?
Circumcision reduces the amount of smegma produced by the male. Smegma is a combination of exfoliated epithelial cells, transudated skin oils, and moisture that can accumulate under the foreskin of males and within the female vulva area. It has a characteristic strong odor and taste, and is common to all mammals—male and female. While smegma is generally not believed to be harmful to health, the strong odour may be considered to be a nuisance or give the impression of a lack of hygiene.