When your friends come over with their CD collection and you burn them onto your itunes library. Guests can make their own mixed CDs with your music too.
Skye: Holy shit! I got the new Underoath CD yesterday! Its so fucking HxC!
Steph: I wish i had enough allowance money left to buy it!
Skye: How bout' I come over and burn it on your computer?
I can make a copy of your 30 Seconds to Mars CD too!
Steph: Sounds like a BURN PARTY!!!