Assessing the rectal sphincter

You are about to perform a rectal examination of an older adult.

What are the steps to examine this patient?
Explain your rationale.
What are some findings you can have while assessing the rectal sphincter?
Describe the differences during the rectal examination of acute prostatitis and benign prostatic hypertrophy.
What findings would expect on physical examination of acute prostatitis and benign prostatic hypertrophy?