Need to know a certain song
 

Hey there is this one song that i just cannot seem to figure out.... It's like R&B or Oldies or some sort of love song, It starts out with a guitar on a wah pedal for about 4 notes then a guy with this semi deep sounding voice comes in in with this emotional sounding tone and i THINK he says "I've been feelin fiiiinne, baby!" but i could be wrong. You have most likely heard it before because it is on alot of things usually related to "getting in the mood". I know it was on King of the Hill once when the indian guy was giving a massage. please please please someone tell me what this song is called and who it is by! I would greatly appreciate it! Thanks

I actually dont know the song or artist but i do know that you can go on a lyric website such as lyrics.com or lyricfind.com and type in the few words that you think you know:D

Marvin Gaye---- Let's Get It On

Would love to help but need a little more info, drawing a total blank, do you know any hook lines?