If we take a look at lists of the top songs (e.g. Billboard Hot 100), they're likely to be dominated by love songs.
Why? Sure, it's a powerful emotion, but there're other powerful emotions out there (e.g. hope) or concepts that induce strong emotional responses (e.g. revenge, justice). Yet most if not all the leading singers seem to write love song after love song as though there's an insatiable demand for them.
Is there something about love that makes it a source of inspiration for writing songs, or that makes it popular? Why is writing (and evidently listening to) them so popular anyway?