Marvin Gaye- Let's Get It On (Intro) this is an alternate way of playing the song intro. It's actually in "C", i think, but this works as well. w/ wah-wah ----------------------------| ----------------------------| --------15-17b-17r-15-17----| --15-17---------------------| ----------------------------| ----------------------------| From here, you can improvise in "G" and phrase the music with the words.