The new toy

Me:  "So, are you going to let me use your new MP3 player on our trip?"
Him:  "You've got your own"
Me:  "But why would I bring mine if I could just use yours?"
Him:  "Why would you use mine if you've got your own?"
Me:  "I want to use the cool one.  Mine's old.  I'll only use it if you're not."
Him:  "No"
Me:  "Meanie"
Him:  "But you've got your own"
Me:  "Meanie"