Being nervous, and embarrassed about my up-coming colonoscopy, on a recommendation, I decided to have it done while visiting friends in San Francisco. Allegedly, the nurses are very beautiful and they are much more gentle. As I lay naked on my side on the table, the gorgeous nurse began my procedure. She told me, "Now don't worry, at this stage of the procedure, it's quite normal to get an erection." "I don't have an erection," I replied. "I do." replied the nurse. Never get a colonoscopy in San Francisco.