cause and effect.

there is a candle. it is lit. someone walks out. he or she touches it with his or her left hand.

person: ow!

he or she touches it with his or her left hand, again.

person: ow! jesus!

he or she touches it with his or her left hand, again.

person: oh! christ! that really hurts!

he or she pauses. thinks. considers. touches the flame with his or her right hand.