I think she asked him to work on their relationship. Like, he's the one who initiated the relationship ("I'm the one who put it there in the first place"), and just wants to be in love with her ("I'm trying to work it to a soft spot and lie there a while"). But "south of her shoulder, and west of her spine" is definitely her heart.
"Well I've a vague idea, but it was under the pale moon light" makes me think that he can't remember exactly how they fell in love in the first place.
I think she asked him to work on their relationship. Like, he's the one who initiated the relationship ("I'm the one who put it there in the first place"), and just wants to be in love with her ("I'm trying to work it to a soft spot and lie there a while"). But "south of her shoulder, and west of her spine" is definitely her heart.
"Well I've a vague idea, but it was under the pale moon light" makes me think that he can't remember exactly how they fell in love in the first place.