On my job I end up jumping out of planes. Last week I got in an 18-wheeler and drove down a runway onto a skid track. The week before that they put me in a car and sunk me to the bottom of a lake to see if I could escape without an oxygen tank.
We've all had that fear that despair of losing someone or this fierce desire because it's not reciprocated. The less reciprocation there is the more desire we have.