You drive a car in the evening, and encounter a sudden rainstorm. You find there are 3 people waiting for bus on your way home.
First guy is an old man. He is serious ill. May be he would die if he can????t get to the hospital soon. Second guy is a doctor. He saved you before, and you want to pay back all the time. The third one is a man/woman. You fall in love with him/her at first sight. Properly, he/she is the Mr./Ms. Right that you looking for.
But your car only can take one more person. Which one will you pick up?