normally on school nights, i would be in about 12:30 AM and then be out of bed at 11:40 AM (an average of 12 hrs/10 min). i know i'm quite lazy there, xD. the days before school nights, i go to bed at 11:00 PM and wake up by 6:00 PM (8 hrs). well, there is a "clinical" cause for oversleeping or undersleeping...