I think that this song is about telling someone that you don't want to be romantically involved with them anymore along with saying that they didn't deserve you on the first place. The first talks about hurting your lover, but not feeling any regret "I don't owe you anything." The second part is about the speaker leaving there lover and making it obvious. He is leaving and telling her to shut her knees, because he no longer wants to have sex with her. The shape of her open legs, with her knees bent, looks like a parenthesis. He is also saying that he wants to close the parenthesis symbolically. Their whole relationship was just a side note, something in parenthesis that was not important to the whole sentence or paragraph. Now he is leaving and ending it, closing the parenthesis. The part about the phantom memory is because he is cutting the girl out of his life. He is amputating their relationship, but he won't have phantom memories of her, in other words, regrets. He is leaving and won't think of her again.
I think that this song is about telling someone that you don't want to be romantically involved with them anymore along with saying that they didn't deserve you on the first place. The first talks about hurting your lover, but not feeling any regret "I don't owe you anything." The second part is about the speaker leaving there lover and making it obvious. He is leaving and telling her to shut her knees, because he no longer wants to have sex with her. The shape of her open legs, with her knees bent, looks like a parenthesis. He is also saying that he wants to close the parenthesis symbolically. Their whole relationship was just a side note, something in parenthesis that was not important to the whole sentence or paragraph. Now he is leaving and ending it, closing the parenthesis. The part about the phantom memory is because he is cutting the girl out of his life. He is amputating their relationship, but he won't have phantom memories of her, in other words, regrets. He is leaving and won't think of her again.