I think the song is about the band The Front Bottoms which McCafferty, specifically Nick are compared to.
'Stole all my lines from this guy named Brain' - Brian Sella, the lead singer of TFB.
'From the back of the porch' is a reference to 'Hooped Earrings' by TFB - 'I’m standing on the back porch for support'
The same is for the lines about staring a necks, it's from the same song
The whole reference to werewolves is a reference to a line from 'Be Nice To Me'
I think the song is about the band The Front Bottoms which McCafferty, specifically Nick are compared to. 'Stole all my lines from this guy named Brain' - Brian Sella, the lead singer of TFB. 'From the back of the porch' is a reference to 'Hooped Earrings' by TFB - 'I’m standing on the back porch for support' The same is for the lines about staring a necks, it's from the same song The whole reference to werewolves is a reference to a line from 'Be Nice To Me'
And I think that's all of them?