We’ve seen some strange musical instruments in our days, but this probably takes the prize.

United States patent 5163447 is for a Force-Sensitive, Sound-Playing Condom – aka, the musical condom.

The musical condom looks and acts like a traditional condom but it incorporates “a chip-controlled piezoelectric sound transducer (18) which plays a melody or voiced message when during intercourse.  The contacts of the sound-playing unit are closed and the transducer is activated” by forceful movements.

Here’s what InventorSpot’s Elizabeth Valeri had to say about the musical condom:

The prophylactic works like this: record a song or message, put the prophylactic on, begin your business, then every time you thrust your recording is played out loud.

You can be as sweet as you like, “I love you Valentine,” as dirty as you like, “Who’s your daddy?” or as conceited as your partner suspects you are by recording things like a drum roll, or the theme song from Apocalypse Now, Wagner’s: The Ride of the Valkyries.

This really opens up whole new worlds of musical expression – think about using this to control a synth!

Let me know how you’d use a musical condom in the comments….