Your textbook is obviously not a good source of information on this subject. "Penile cancer is one of the rarest cancers - rarer even than breast cancer in men - and figures for it are hard to come by. Circumcised men
get penile cancer at about the same tiny rate as intact men. Early
studies that seemed to show a correlation had not been corrected for
age; penile cancer is a disease of old men, and the old men with cancer
in the studies had simply been born at a time when circumcision was less
customary than when the younger men without cancer were born. When men
of the same ages were compared, the correlation vanished." Quoted from http://www.circumstitions.com/Cancer.html I would encourage you to check out the page.
If you are seriously interested in the subjects of health and disease then you need a more accurate understanding of reality than the contemporary western alopathic medical paradigm can provide.
Considering what you said in a previous post about circumcision and anaesthesia, I do not understand how there could be a doctor in your ward or whatever who not only performs circumcisions on infants but also does so without anaesthetic. You and the other nurses involved should be making a formal complaint about this. It is your moral and ethical and professional duty.