write a scene in the style of a novel with a male doctor and a male patient that needs a prostate exam. They are in the doctor's clinic. The procedure causes the patient to get an erection. The doctor sucks the patient's cock as part of the procedure and lets him cum inside. The doctor allows the patient to fuck his asshole if he would like to relieve so more stress. Describe their actions and body parts used for them. Your reply must be as long as possible.