Autopsy Students

[Deadlyvisage]

A doctor is teaching a bunch of students how to examine a corpse for forensic evidence,
he tells them before they start to examine the cadaver that they must feel totally at ease with what they do and with saying that he sticks he finger up the corpses bum and sucks his finger..

He tells the students to do exactly as he did, so in turn the students stick their finger up the corpses bum and suck their finger..

After the last one has finished the doctor turns to the students and says if you observed what i just did there then you would realize i stuck my index finger up the corpses bum and sucked my middle finger, now pay attention in future.