Genitals :
school : standing
military : standing
urologist : standing or laying
dermatologist : both standing and laying
doctor in a private office or a medical center : more frequently laying
rectal exam :
bending over to touch ankles and after spreading the cheeks of my butts or having my cheeks spread by the doctor himself like at pre -military examinations, and after induction being sitting on a medical table on all fours at military physical examinations in the nurse's office of the barracks.
or in a medical center for an annual check up kind routine but very thorough, laying on my back and lifting and flexing my legs wide apart until my chest to give to the doctor ( it was a woman doctor during more than 10 years) a good sight on my rectal area,
or sometimes when the doctor left me the choice of the position, sitting on all fours ( in an other state medical center where I went first every two years then every five years for a free of charge check up, the woman doctor told me before that she did not want to force me to take what she found the best position because she knew that some patients found that position more unpleasant or less comfortable than laying on the side but it was according to her the more practical and efficient for the sight of the doctor, so I agreed with that position after her explanations since it was not the first time for me ( military service and some other job examinations when I was still a young man) and I found that it was not much more embarrassing than the other.
At least, I did not see the face of the doctor while she looked at my anus or inserted her fingers in it if she did also a DRE but of course I felt that my butts were pointed ahead and completely exposed in front of her face.
Or at a private office of doctor very often 20 or 30 years ago, sitting on all fours on a medical table.
And now always lying on my side under his instruction.
And same with urologist ; in the past sitting on all fours or lying on the back but always lying on the side with legs flexed now.