I don't know about many people but I will usually associate songs that I listen to to a particular event/game/TV show/etc.
Which has given me many odd combinations.
Take "The Enchanted Lake" (aka "Swan Lake") by Tchaikovsky, from Swan Lake. When I hear this song I don't think of swans or lakes or whatever it is that I am supposed to think of when I hear that song.
I think of Jeremy Clarkson in a Range Rover Sport being chased by some guys in a Challenger 2 tank.
Same goes for the theme from A Fistful of Dollars, not Clint Eastwood being a cowboy but Top Gear once again. This time when Richard Hammond stopped that factory when they were building the road ("Men of the D5481, this is our darkest hour, we will not let Adolf Hammond ruin our plans for this great, this wonderful...")
"Invocation" by Killing Joke makes me think of James May racing those Parkour guys in a Peugeot 207 not whatever the song is about.
"House of the Rising Sun", specifically the cover by The Animals reminds me of GTA:VC because it was on a custom radio station that someone gave me.
For some reason out of all the songs on the game Battlefield: Vietnam only the song "Psychotic Reaction" (Count Five) reminds me most of the game.
A few songs will remind me of events in my own life but people don't want to hear about things that actually happened to me.
Now playing: UNKLE - When Things Explode (feat. Ian Astbury)