If only you lived nearby. I would need an extra long appointment, maybe an hour or two. I've been fist fucked before, so you would not need to exercise my hole too much before being able to get your hand inside my body, and then with working it in and out a bit, I should loosen up nicely so that you could thoroughly explore the interior of my anus and intestine, moving your hand in all directions, feeling, probing, and hopefully managing to get well inside my inner works.
That's the sort of role play medical inspection that I've always wanted, with the doctor inserting his entire hand so that he can perform a thorough examination. Alas, it's never happened.
Any idea where I could buy them?