Nice screaming just before the 4-minute mark, wish they had some more. And I'm not sure why everyone's so shocked they wrote a song about jacking off - it's not like they're the first. *coughFaith No More - Epiccough*
according to the band, this song is half about masturbation, the other is empty sex. when casey and brendan were writing the lyrics together, brendan was still a virgin. so he was writing lyrics from the perspective of masturbation. the song also stretches to emotions beyond sex like isolation, embarrassment, resentment, and regret, which are negative effects from said events.