I have been listening to this song a lot lately. It's always been one of my favorites, it was one of the Fleetwood Mac songs I knew from the radio and from my parents before I was a big Fleetwood Mac fan. Anyway, it's a beautifully crafted song. It's definitely one of Christine's best as well as the entire band. The instruments and vocals are flawless.
I came across this video on YouTube
http://youtu.be/eRtJpWtQFFw
I love the way the Lindsey and Stevie characters sing the "aaahhhhahhhh" during the chorus. That is one of the things that I love about the original version of You Make Loving Fun. How nice would it have sounded if Lindsey and Stevie sang that part when they played this song live all through the 70s and 80s.