I prefer without music because I have a tendency to sing along with the lyrics. That being said, I almost always play music because I worry that my neighbors will hear me in the act.
Imagine my former partner's thoughts when I sang "would you upset if I told you we were dying?" in the middle of intercourse. How embarrassing!
Surrounded by 4 floor speakers hooked into a 150 watt per channel amp. Cue up dance/techno of your choice. Insert earplugs, feel the drive. Also put an oscillating fan blow back and forth for sensory change. Strobe lights can be interesting also.
Oh the memories!!!
Remember Bo Derek's famous exchange in the film "10" - [this is a paraphrase, from memory, but I think I've got the thrust of it] -
Bo Derek: 'What do you like to do when listening to Ravel's "Bolero"? (puts it on the stereo - yes it was quite a while ago).
Dudley Moore: 'I Dunno'.
Bo Derek: "I like to fu*k".
Next scene - use your imagination.
I've always had that scene in mind every time I've listened to it since!
I had an ex. once, who used to choose 'sex music' for purely comic effect.
A case of, "Hit the 'play' button and off we go!" with no idea what she had arranged as the sound track.
It turned out to be a selection - everything from Verdi's 'Dies Irae', through hard rock and opera, to the sodding 'Birdy Song'.
Honestly ... the Birdy Song! ... have you ever tried to have sex to "Da-da-da-da-dadda-da! Da-da-da-da-dadda-da! Da-da-da-DAAA!"?