Romantic interludes call for a soundtrack. Well, they don't even have to be "romantic," even lust fueled purely physical encounters can use some tunes.
I often hear Marvin Gaye and Al Green mentioned as being good make out music. I can't stand that kind of stuff but I celebrate your right to enjoy it. It would distract me and I'd have to ask you to put on something else. :)
Instrumental smooth jazz is my mainstay. I prefer instrumental because I don't want to listen to words when things are getting hot and heavy. There is one exception; Donna Summer's Greatest Hits. It's not safe to be around me when thats on.
What are you using for an audio aphrodesiac?