A bunch of new med students walk into the classroom,and on the table is a dead guy. the professor greets them and begins his lesson. he tells them they need to know find the cause of death, so he begins to insert his finger into the dead bodies rectum takes it out and puts it in his mouth. he next instructs the students to do the same. there all shocked and disgusted but one by one insert finger and stick it in there mouth. once there all done he tells them good job u have just learned the first and most important lesson,
PAY ATTENTION CAREFULLY
I inserted my middle finger but sucked on my pointer ;D