GF: If you have to choose who will die first between you and me... well, who will you choose?
BF: Of course, you first to die.
GF: OMG! You love yourself most, I'm so disappointed.
BF: I choose you to die first, cause I know you well. If I die first, you're going to be so lonely crying over me, you will miss me so bad and that will make you get sick and turn you into such an unhappy old lady. So, I think I wait till you die first, cause I will die right away after you.
GF: ..... (start to cry and smile at the same time)