Boyz on Da Piano?

I think Easy-E's line "Don't quote me boy cause I ain't said shit" comes off as a little paranoid. If he doesn't want to be quoted, why did he agree to make the song and have it widely distributed? Also, in the beginning of the song, Dre asks him to "come off the piano for a minute and bust this crazy shit". Are we to believe that when he wasn't sprayin suckas with his Mac-10, he was playin chopsticks on da piano?