Why is it that in prostate exams they put finger their up you butt?

A prostate exam does not involve inserting a finger into the rectum; instead, the doctor inserts a lubricated, gloved finger into the patient's rectum to feel the prostate gland, which is located just in front of the rectum. This allows the doctor to check for any abnormalities, such as lumps or swelling, which could indicate prostate cancer.