Sexiest Pop Song Ever?

What do you think is the sexiest pop song ever (not classical, jazz etc.)? I'm a guy, so I'm pretty much scanning through the portfolio of female pop music over the last 40 years or so. I can point to some sexy Kate Bush tunes (Wuthering Heights), Joni Mitchell (take your pick), some good stuff from the female singers of Zero Seven, Carly Simon, Christine McVie, Chaka Khan, Diana Ross et. al.

For me the song that gets my testostaroni going is "Sarah" by Stevie Nicks, off the Tusk album. The opening keyboards and her angelic voice do it for me like no other. When she sings the line about "undoing the laces", well it doesn't get any sexier to me. A truly great song.

Now what's yours?
I think it's called "he made a woman outta me" off the Crossroads (Ry Cooder) soundtrack.
I like Prince "Do Me Baby", George Michael "I Want Your Sex" and Rick James "Give It To Me Baby" and "Super Freak"

Not pop but r&b Betty Wright"Tonight's The Night" the live version of that song. Some of the words go something like this " tonight is the night you make me a woman, you said you'll be gentle with me and I hope you will, i'm nervous, i'm trembling waiting for you to walk through the door".
Bryan Ferry - 'Boys and Girls', the entire CD. Essential music for bedroom sports.
If you've ever "really" heard it.
Art of Noise: "Moments in Love"
Up until about the 7 minute mark it is probably unintentionally the sexiest song ever. Those who know, know what I'm talking about.
It is the one of those songs that could literally play FOREVER on an endless loop and be OK with me.
(minus what happens between the 6:50 - 7:10 time stamp)