It's one of the unpleasant things that has to be done, and after awhile student actually get used to it, and even grow fond of their cadavers. A medical student at UCLA was given a cadaver to dissect. She started at the bottom, on the legs, and gradually worked her way to the top.
Dissections can take place over many months, and usually in teams of students.
By the time this woman's group made it to the torso, they were used to the sight of the body and decided to have some fun. This cadaver was particularly well endowed. When they came to the end of the dissection, it was time for the head. Removing the shroud, one of the medical students shrieked and fainted. She dropped out of the program in shame and has not been heard from since.