Because you’ve officially gotten your way.  Yup, that’s right—I’m giving you exactly what you asked for.  Doesn’t feel as good as you thought it would, does it?  I didn’t think so.  My generosity in the face of your selfishness, coupled with seeing how hurt my feelings are, plays on your emotions and overshadows your desire to win the prize that, until just seconds ago, you sought with all your being. 

No, thank you.  I no longer wish to have the prize we both want.  I just want to sit here alone and think about the things you possess.

It’s fine.