They should've just called this album "Eargasm" and been done with it. Though then again, considering Zep's catalog, they'd have to call this "Eargasm Five" and that would get a little redundant after a while.
I love the intro to this song. And the song itself is really... well, fun. I love when Zeppelin made songs like Black Country Woman: laid-back, funny and still amazing.
Also this was one of the VERY few Zeppelin songs to not have any shouts whatsoever, so I'm changing that.