Drastic

Lost your pen = no pen
No pen = no notes
No notes = no study
no study = fail
fail = no diploma
no diploma = no work
no work = no money
no money = no food
no food = you get skinny
skinny = then you get ugly
ugly = no lover
no lover = no marriage
no marriage = no children
no children = alone
alone = depression
depression = sickness
sickness = death
lesson: Don't loose your pen.