Twin

If I had a twin who went to my school, I would make them go to my classes on days when i was tired. In fact I would probably do the same thing for work. It all comes down to sleep really. I would use my twin willingly to get more sleep. I hate being tired and caffeine doesn't give you energy it just keeps you from replenishing it, in sleep that is. This is all based on the hope that we would be identical and that they are an insomniac.