How do I keep from getting an erection? I m 13 and have a physical tommorrow. Doctor is male I believe. I get aroused pretty easily even when not mentally stimulated. I m too easily Physically stimulated. Yes, I know this is natural for my age. but besides Think of a math problem in your head This is natural. If the doctor is professional, he will continue on with the exam etc. What s an effective way to keep from getting an erection?