The problem with offering a list of music which portrays sexual sadomasochism is what to leave out, not what to include. Any list has to be an indication of personal experience and tastes: being either complete or definitive will fail. The same could be said for attempting to list sadomasochism in the movies.

SM in military music

Military music needs to be understood in the context of the training, kit preparation and inspections prior to the parade ground.
Military music is an expression of the togetherness, the cohesion plus maybe pomp and pride of the military unit, another reading is a release of emotions through music and, most relevant to sadomasochism, a summation of military discipline.
Concert performances of military music usually convey a greater musical range than parade ground performances intended to mark time.
Listen to almost any military parade music - or watch Trooping the Colour - and think of the kit preparation, the drilling and the rehearsing and you begin to have a sense of the pain and suffering underlying the parade ground pomp but also the joy of working as a group and the personal pride. I can't pick just one march which summarises this but in the more sophisticated language of the Emperor Waltz, Johann Strauss illustrates both the military discipline and the swagger, particularly clear in Karajan's readings.

SM in popular and classical music

Clear gay (or male alone) sexual themes are comparatively common, if notorious and not often played on the BBC: Relax - Franke Goes to Hollywood; My Little Ukelele - George Formby; Sexomatic - The BarKays; Tainted Love - Marc Almond; He Whipped My Ass In Tennis (Then I Fucked His Ass In Bed) and almost every other track by Pansy Division; So many men, so little time - Miquel Brown; Rough Stuff - Adam Ant
Ambiguity is a fudge... who is kidding who? Submission - Sex Pistols, superficially about a submarine mission or is that muff diving? I Want Your Sex - George Michael

Clearly SM

• Masters and Servants - Duran Duran
• Masochism Tango - Tom Lehrer
• Music in 12 Parts - Philip Glass (although terifically suitable and popular for SM activities, it appears it was not the intention of the composer to depict SM in music, the same could be said of many Tangerine Dream albums)
• The Seven Last Words of Christ on the Cross, op. 51 - Haydn
• The Martyrdom of St. Sebastian - Debussy
• Spartacus - Khachaturian
• Slave to the Rhythm - Grace Jones
• Hit Me With Your Rhythm Stick - Ian Dury & The Blockheads
• Do you Really Want to Hurt Me - Culture Club
• Macho Man - Village People
• I'm a Scatman - Scatman John
• Hurt So Good - Jimmy Somerville
• Hurts So Good - John Mellencamp

Could have an SM meaning if you imagine hard

• Every Breath You Take - Police
• Left To My Own Devices - Pet Shop Boys

SM in opera

Limiting the list to SM in opera helps... (despite substantial anecdotal evidence there is currently no genetic proof that a liking for opera is linked to a taste for sadomasochism). Note that in most operas sexual sadomasochism is an undercurrent, a contributory theme to the general ambience of the piece. I've tried to list the just the prominent example from each composer (in my view).

• Turandot has placed herself almost impossibly inaccessible from all suitors by a trial which could result in either the death or marriage of the suitor; she thus becomes the unattainable sexual objective and an atmosphere of sexual denial and repression pervades the whole piece - Puccini
• Die Zauberflöte - Papageno must undergo Masonic type trials through fire and water - Mozart
• Mefistofele - Faustus makes a hedonistic pact with the devil - Boito
• Aida - Radames and Aida are entombed to die together - Verdi
• La Vestale - Giulia fails as a Vestal Virgin and is walled up to die in a tomb to die alone (though the goddess Vesta reprieves her) - Spontini
• Billy Budd is flogged as much for his youth and looks as for anything else - Britten
• Fidelio - freedom, liberty - Beethoven
• Tosca - treachery and the judicial torture of Cavardossi - Verdi
• Die Dreigroschenoper - a tale of sexual exploitation - Weil
• Götterdämmerung - Siegfried and the truth drug - Wagner
• Die Meistersinger - Walter must submit to the rules and judgement of the Masters - Wagner
• Carmen helps Jose escape from handcuffs - Bizet
• Samson and Dalila - he looses his physical strength when his hair is cut - Sant Saens
• Cavalleria Rusticana - Lola endures Turriddu's beatings - Mascagni
• Norma - Pollione and Norma die togther burnt at the stake - Bellini
• Dialogues of the Carmelites - guillotining of thirteen nuns - Poulenc

Listing deaths by fire on stage shows this to be a surpassingly frequent cause of death in opera!

• Brünnhilde: Götterdämmerung, Wagner
• Joan of Arc: Orleanskaya Dyeva, Tchaikovsky
• Purgation of the heretics: Don Carlos, Verdi

A completely different topic:

• Sadomasochism at the opera house: attending wearing a toy (CBT and chastity toys come to mind) or sitting plugged (but please don't disturb the other people in the audience: if this makes you figet it would be much better to do this at home).

Thanks to everyone for suggestions so far: any more suggestions or recommendations? Get in touch

Booklist for readers of milism.net