Absolute Lithops Effect

This is a sequel to 2001's "Reckless Abandon", and features the band looking back on their clumsy youth fondly.

“Plastic Bag” is a song about searching for an escape from personal problems and hoping to find it in the lively atmosphere of a Saturday night party. Ed Sheeran tells the story of his friend and the myriad of troubles he is going through. Unable to find any solutions, this friend seeks a last resort in a party and the vanity that comes with it. “I overthink and have trouble sleepin’ / All purpose gone and don’t have a reason / And there’s no doctor to stop this bleedin’ / So I left home and jumped in the deep end,” Ed Sheeran sings in verse one. He continues by adding that this person is feeling the weight of having disappointed his father and doesn’t have any friends to rely on in this difficult moment. In the second verse, Ed sings about the role of grief in his friend’s plight and his dwindling faith in prayer. “Saturday night is givin’ me a reason to rely on the strobe lights / The lifeline of a promise in a shot glass, and I’ll take that / If you’re givin’ out love from a plastic bag,” Ed sings on the chorus, as his friend turns to new vices in hopes of feeling better.

While the obvious connections with suicide or alcoholism could be drawn easily, more subtly this song could be about someone who views the world through a negative lens constantly and how as much as the writer tries to show the beauty in the world, this person refuses to see it. It's one or another between the rope and the bottle. There is no good option for this person. They can't see it. Skiba sings it in a kind of exasperated way like He's tired of hearing this negative view constantly and just allowing that person to continue feeling the way they feel knowing he can't do anything about it. You can hear it when he says maybe you're a vampire.

I think the meaning is pretty clear. This person got really burned in a previous relationship, and because of this is unable to love and show care in his present one, even though he so badly wants to. It's lovely song, and very sad. You can really feel how defeated and frustrated he is with himself.

In the 1980s, sunglasses were a common fashion for people who wanted to adopt a "tough guy" persona (note all the cop shows from that era -- Simon & Simon, Miami Vice, etc. -- where the lead characters wore shades). So I think this song is about a guy who wears shades as a way of hiding his insecurity after learning that his girlfriend is cheating on him. He's trying to pretend that he's a "tough guy" to hide the fact that his girlfriend's affair is disturbing him.