Give me a subject for a song, and I'll write you one, a minute or less in length (unless I get really inspired), fitting your subject.
EXAMPLES OF GOOD REQUESTS:
"Write me a song about the mantis shrimp."
"Write me a song about the worst birthday you've ever had."
"Provide me with a short instrumental that you think would make good backing music for a Tetris clone."
"Play me a song about anything just using percussion and voice."
"Sing me the song Aeris sung to Cloud when she was getting him to try on pretty dresses in the alternate universe where FF7 was a musical."*
*not wizard rock, so - cardboard rox?
EXAMPLES OF BAD REQUESTS:
"lol write me a death metal song using only a swanee whistle and a phonebook as instruments about the achievements of Clement Atlee as Prime Minister of Great Britain and by the way i can't tell the difference between 'fun' and 'annoying''
"OOH COULD YOU SING LOVE DETERRENCE I REALLY LOVE THAT SONG"
I'm not a very good singer (or performer, or songwriter, but WHO CARES, I NEED THE PRACTICE), and you have roughly equal chance of me doing a crack song or singing it totally seriously. You don't get to pick.