Dr. Brian Morris, Professor of Molecular Medical Sciences. “Here are the Main Benefits of Circumcision”. Opposing Views – It eliminates the risk of phimosis, which affects 1 in 10 older boys and men. This condition refers to a tight foreskin that cannot be pulled back fully, so making cleaning under it, and passing urine, difficult. Phimosis also greatly increases the risk of penile cancer, and is the cause of foreskin and catheter problems in nursing homes.