Anal Lesson

See this hot piece of ass? This is my Science teacher, and this is the time when we were discussing about the digestive system in class. She needed a volunteer to show the class how the rectum works so I gladly helped my teacher. She was planning to demonstrate how stuff get out of the human ass. So she had me strip all my clothes and prepare my tushy for some anal lesson. She put insane amounts of lube in it and started playing with my tight brown winker with her fingers. The all of a sudden, I screamed when I realized she was fucking me hard with a huge dildo. That was awesome.