My partner and I have a song that once fit our situation very well, and it became "our song."
And now every time it's on, I'm obligated to drop whatever I'm doing, alter my mood from whatever it may be (bored, indifferent, angry, etc.), and force some sentimentality for two and a half minutes.
And it happens to be a very popular song, currently.
Ugh. Harder than it should be.