When I was 9 or so, I got a terrible stomach ache, vomiting and all. Mommy called the doctor (in those days, they still made home calls and the state health insurance paid for it...). I remember the lady asking my mom for vaseline (which I knew about because mommy used it on little bro's thermometer when he was sick). I was really surprised by what followed - a finger up the butt palpating me from the inside.
I got a second rectal exam (same position, no surprise thus) from the surgeon at the clinic, which, in addition to various probings, confirmed I had appendicitis.