I think Music of the Night is quite seductive. Such an entrancing song. However, I too thought of Jekyll and Hyde when I saw the word "sensual."
If you're for sexy then anything from Chicago or the Wild party. If you're looking for something raunchy like Contact, as mentioned above, then my vote has to do to the puppets with You Could Be As Loud As The Hell You Want (When You're Making Love). God, that has to be the longest song title ever.
"I haven't got a pail."
"Find your grail, your GRAIL!"
"But it's not missing. It's right on the counter where it's supposed to- defying gravity, my giant cup's gone!"
"Five hundred, twenty-five thousand, six hundred minutes. How do you measure... measure a year?"
"How many times do I have to tell you, it's five hundred twenty-five thousand, five hundred and eighty-five point thirty-two minutes. You will never graduate if you keep basing your math on showtunes."
"You ruin Broadway for me."
"As well I should."