McRae explained this song: "Melancholy isn't fatal, it seems to only be the English that can't allow themselves to revel in it as a counterpoint to the total blandness of unmediated happiness. What the hell ever came out of being happy? Happy people make me nervous."
"Kickstart My Heart" is about all the ways Motley Crue gets their blood flowing without drugs. It was inspired by their bass player Nikki Sixx, who claimed he had to be revived with a shot of adrenaline to the heart after an overdose.