I would prefer “Playground Love” off their soundtrack for “The Virgin Suicides.”
As far as getting-it-on music, I like Maxwell’s Urban Hang Suite album.
One currently popular song that does it for me is “Gangsta Luv” by Snoop Dogg and The Dream. Something about the guy breathing heavily in the background while Snoop raps…
It’s like “True Blood”
I sink my teeth in
I’ll add one that I just heard yesterday: “Lying is the most fun a girl can have without taking her clothes off” by Panic at the Disco.
His voice is so low and intimate, and when he says “I’ve got more wit, a better kiss, a hotter touch, a better fuck”, and “Am I who you think about in bed?”…Yumminess.
Ooh, good call.
I forgot my husband’s favourite steamy song - En Vogue, “Don’t Let Go (Love)”. You’ve got the right to lose control.
That one’s great too. Still wishing I could find someone worth playing it for… :o
There are songs about sex then there’s sexy voices.
Stevie Nicks come to mind, it’s that very slight lisp in her voice as well as her image.
The “growl” of Alison Moyet.
Chrissie Hynde - soft yet strong
Funny – although Stevie was gorgeous, I never cared that much for her voice.
Christine McVie, on the other hand – I ALWAYS wanted to make her feel better…
Heartbeats by the Knife always does it for me. I don’t know why.
Jose Gonzalez, who did the awesome cover of Massive Attack’s “Teardrop”, also does a killer cover of this song.
DJ Shadow’s Endtroducing… is the ultimate spend a day locked in sexing album for me.
Thought of two more (I can’t believe I didn’t think of them first!):
Black and Blue - Van Halen
Dr Love - Hardline
“Midnight Blue” - Melissa Manchester
Can’t believe I forgot **Patricia Barber **in my first pass
I Could Eat Your Words
You and the Night and the Music
“Come Undone” Duran Duran has been my classic groin song. When I finally had sex to it, I felt like my life had become a little more complete.
Rebel Yell. Billy Idol. This is a recent development, I have absolutely no idea why, and I’m slightly embarrassed to admit it.
A little late to the party, sorry! Kinda surprised no one mentioned Barry White, unless I missed it. He seems to be sorta the default setting for alot of people, mostly women, I guess.
Was going to mention Stevie Wonder’s “Do I Do” for the sheer, ecstatic, life affirming, lets-have-sex joy of the lyrics & groove of it. 
“Whole Lotta Love” - Led Zeppelin. God, Robert Plant was pure sex back in the day.
Stranglehold by Ted Nugent.
er…never mind those lyrics, m’kay?
Right Hand Man and Ladder by Joan Osborne.
And yeah, Magic Man from Heart - that wailing guitar just slides right down the spine to the gonads.
For romance, Come Away With Me by Norah Jones, Romeo and Juliet by Dire Straits, I Don’t Know How To Love Him by Yvonne Elliman, and Loving Her Was Easier Than Anything I’ll Ever Do Again by the immortal Kristofferson. What can I say? I’m a child of the '70’s.
Well, yeah!
Yeah, I feel exactly the same way. Stevie was just too freakin’ ethereal for me. Christine sounded like a real woman, not a Celtic ghost.
Joan Jett - Do You Wanna Touch?
and
(don’t laugh) Michael Bolton - Can I Touch You There?
…Soft As Snow But Warm Inside, Thorn and Only Shallow. 
Other noted knicker-looseners back in the day included the first two Massive Attack albums Blue Lines and Protection, The Cocteau Twins Treasure and Head Over Heels, Cowboy Junkies Trinity Sessions, Tricky Maxinquaye, Portishead Dummy, The Fall Perverted by Language and Mazzy Star So Tonight That I might See.
One of the above albums is utterly useless for seduction purposes and is included as a test.