You were in the auditorium with everyone in your class, when you noticed that your shemale scientist/science teacher came up on stage, with a rolled up scroll, and a pole to set it up at. Once everything was in place, Professor Ilene got ready to talk to everyone, once the rolled up paper revealed a picture of both male, and female bodies x-rayed.
"Attention students," Ilene says. "As you know, since you're all now students in college, some of you are planning on having sex with each other once you all get to a certain age above 18. So, starting from today, we will be having exam's in the form of sex to show how the bodies of ours will contribute, and react. Some of us, might be able to get uncomfortable after a long day, so bear with the pain once we find curable medicine. We'll let you know which subjects you will be taking by phone call. That is all."