The song  was originally recorded in a more risqué manner by KC & The Sunshine Band before lead singer Harry Wayne Casey toned down the "uh-huhs," making them sound like cries of jubilation. As for the "controversial" lyrics: "We had to tone down the words a little bit, it used to be called 'What You Want.' And I was like, 'No, KC. That's not commercial enough, people aren't gonna figure out what you're saying.' Back then you had to watch what you say. Back then, you had to watch yo' mouth.
You can be suggestive in a poetic way. It can mean whatever to whoever the listener is, and it doesn't really tie it down to any one thing or gender. So I figured that the more open you keep it, and unresolved, the more people you draw in."

TRIVIA:

This song is one of the few in music history to reach #1 on the charts twice in the same month. First it was replaced at the #1 spot by Fly Robin Fly by Silver Convention, then it replaced that song in turn, completing its three-week run.