Some of their choices are surprising to me, and here is likely why -- Billboard defines the terms as the sexiest songs are songs about sex, no romance or foreplay at Billboard apparently, and they are ranked based on their performance on the Billboard Hot 100 chart which ranks by radio airplay and sales.
So these really aren't the best sex songs, or necessarily the sexiest songs, they are the most successful songs about sex.
Here is the top ten: Olivia Newton John - Physical, Rod Stewart - Tonight's The Night, Boyz II Men - I'll Make Love To You, Next - Too Close, Marvin Gaye - Let's Get It On, Donna Summer - Hot Stuff, Captain and Tennille - Do That To Me One More Time, Madonna - Like A Virgin, Exile - Kiss You All Over, and Rod Stewart - Do Ya Think I'm Sexy?
There is some good stuff on here, like the two Rod Stewart songs, and some I would not have thought of and I think are terrific, like Captain and Tennille (what, no Muskrat Love...).
There are also wonky choices, for example Madonna has sexier songs, like Justify My Love, but I guess Like a Virgin was the bigger hit. Both are about sex, unlike Material Girl, which is pretty much about being a whore. Which is ok with me (the song, not being a whore) because it is fun and danceable and had a glamorous video.
One mystery to me in the top ten ---what the hell is Too Close by Next?Surprises? These songs in the Top 50 that I would have guessed to rank higher: I Want Your Sex, Dim All the Lights, Slow Hand, Feel Like Makin Love, Pour Some Sugar On Me, Love to Love You Baby. Oh, and 50 Cent's Candy Shop (ick).
And yes boys and girls it apparenly counts as sex when you are all by your lonesome, as there are two songs about self-lovin' on the list, Cyndi Lauper's She Bop and Toni Braxton's You're Makin' Me High. What, no I Touch Myself from the Divinyls?
Also on the list is Peter Gabriel's Sledgehammer, which until now I actually did not realise was about sex. Yep, I am that dumb. Or am I just that pure and innocent?
As for Physical, yes I like the song, and love Olivia (hey, my GPS is named Olivia, but that is another story), but is it the sexiest song? This is the restriction of this list. It is her biggest sex hit, and was the top single of the 80s, and yet I think her follow-up single Make A Move On Me was flirtier and sexier, and in terms of just sex, she later did Culture Shock about a threesome, and Tied Up about, well, you know...
You can see the full list at http://www.billboard.com/.