Pen

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 = skinny
Skinny = ugly
Ugly = no love
No love = no marriage
No marriage = no children
No children = alone
Alone = depression
Depression = sickness
Sickness = death

Lesson: Don't lose your PEN, you will DIE!!!