For most male physical exams, the preliminary parts of the exam are the build-up to that one point that you've been anticipating. Ultimately, the time comes when you are instructed to present yourself fully and completely to your examiner. If you're still wearing underwear, you are instructed to lower it or remove it completely, thus removing the last bit of protection for your modesty. Often you're asked to stand before your examiner, hands nervously held at your sides, with your legs parted slightly to provide better access to everything hanging between them. You're now ready. Your examiner begins their intimate inspection of your scrotum, testicles and penis.
Now here's the question: If you had a choice, what state would you like your genitals to be in as you present yourself?
Or to put it another way, what kind of first impression do you want your examiner to have of your manhood? Do you prefer to be slightly aroused, with a penis that is thicker and longer than your normal flaccid state? Do you want the skin of your scrotum to be loose, allowing your testicles to freely hang between your legs? Choosing these options would probably mean that you'd like to impress your examiner with your physical prowess. On the other hand, would you prefer that your penis is small and shriveled, and your scrotum is so tight that they can't even detect that you have any testicles! Choosing this option likely means that you're craving humiliation and embarrassment.
And is your choice different if your examiner is a man vs a woman? Is it different for a play exam vs a real exam?