I decided to go with "Brick" by Ben Folds Five, one of the most heartbreaking melodies I've ever heard. It's about a guy whose high school girlfriend gets an abortion. But the lyrics aren't political or preachy. Wikipedia quotes him as saying, "I didn't really want to write this song from any kind of political standpoint, or make a statement. I just wanted to reflect what it feels like." Wikipedia also refers to it as "the saddest song in the happiest chord" (the song's in the key of D major).