Although some studies have shown that infant circumcision can potentially lower the risk of penile cancer. This risk can be lowered by avoiding Human Papilloma Virus, smoking and practicing good hygiene. In addition the rates of penile cancer in this country are so low that statisticians have calculated that it would take over 900 circumcsions to prevent just one case.
Yes you can as cystitis is not a sexually transmitted infection. However some women find intercourse painful whilst they have cystitis. In addition some cases of cystitis occur after sexual intercourse as bacteria from the vagina can be mechanically 'milked' into the bladder through the short female urethra. In women who suffer with this it is important to empty the bladder straight after intercourse and practice meticulous hygiene.
Laparoscopic partial nephrectomy is a well recognised operation. Like all operations however there are potential risks. With this particular operation there can be significant bleeding both during and after the operation. Very rarely this can result in total loss of that kidney. There can also be a leakage of urine from the cut edge of the kidney that may collect after the operation and need to be drained off. There is also about a 5% risk that if the operation is done to remove a tumour then the cancer can return within the remainder of the kidney at some time in the future that may require it's total removal. The evidence however suggests that for an experienced surgeon the outcomes are as good as open surgery with potentially a quicker post operative recovery and smaller scars.