you understand that isaac hayes and david porter wrote this song and the story that -- i heard storiesut -- i've heard so many stories. we used to -- i would sit down with the musicians, and an hour before we ever made music, they would just sit and tell me stories. they were amazing. and they said, well, you know, the way they got that was isaac was playing the music and dave had to go to the bathroom. and isaac's like, oh, i think i got it, i think i got it! and dave's like, hold on, hold on, i'm coming! and wait a minute, that's the name of the song! so, that song, the history. >> yeah. >> and i got to actually sing it with sam. >> oh, yeah. >> he was down in florida with me and he came up, and just -- i thought about doing it as a duet, but then i just sang it and went, that's just a great rock song, and that's what so many rock artists did in the '60s and '70s was take the soul music and rerecord it. i mean, the rolling stones have done that many times in the past. >> many times. when you are in the studio, you're taking on one of these tracks, what's your philosophy about how you