The pairing of medical school students in the first week or so of school. These relationships last between either major examinations or 2 weeks or less. Facilitating the carnal needs (ie sex, companionship, etc) as well as study partners and physical study tools, these relationships often result in rotation of female participants between people of PBL or other study groups. These relationships ensure success and survival of first semester of medical school and may continue on after that. These relationships follow the Law of mutual need (“When people of a given group of intellectual status/classification are placed in similar situations, there is assured mutual non-emotional hooking up.”)
My first year of Med School I was part of three medical school couples, one of which the girl had a boyfriend back home. Had i not been with her I would have failed anatomy. I have not talked to her since.