How To Avoid Erection?

Hi, may I answer your health queries right now ? Please type your query here...I'm a male 37 y/0 and have a physical exam next week. My job requires a prostate exam. I made the apointment with a new doctor because I felt uncomfortable with my old doctor. The new doctor is female and I'm terrified I might get an erection, what if I do will she think I'm some pervert?