Whoever had to let go a beloved person involuntarily will understand this song all too well:
It's the most empathetic and melancholic song I know about this rather undesirable side of life.
As a compensation, here's a really cool song about the exact opposite, much brighter side of life - about getting to know someone new and, yes, having really dirty sex
Actually, it's an Eric Burdon / The Animals cover song, but this Smashing Pumpkins version comes along with their usual unbeatable, bloody great drums and guitars
Edit: according to the Rolling Stone
this song could have been inspired by LSD and Sandoz, the company which discovered it
...cough... let's just pretend it's an ambiguous song