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I think "tune up my mo-chine" is talking about the feeling he gets when he's high. Same thing with "screw my brain up tight." "In love again" could mean "addiction" or a relapse.
I think "tune up my mo-chine" is talking about the feeling he gets when he's high. Same thing with "screw my brain up tight." "In love again" could mean "addiction" or a relapse.