I'm going to take a stab here, but after repeating this song over and over I keep thinking that the first lines Kimbra sung is about a person daring to cheat or is already cheating on a person she's not really happy with and most probably a relationship that is almost as good as gone.
This leaves the other (Sam Lawrence's first lines) questioning himself and her if he's still relevant to her or are they really happy with one another.
The lines in the chorus "a strange play with wandering limbs and eager hands" is probably her act of body language that she doesn't want to be with him anymore yet he can't let her go.
I'm going to take a stab here, but after repeating this song over and over I keep thinking that the first lines Kimbra sung is about a person daring to cheat or is already cheating on a person she's not really happy with and most probably a relationship that is almost as good as gone. This leaves the other (Sam Lawrence's first lines) questioning himself and her if he's still relevant to her or are they really happy with one another.
The lines in the chorus "a strange play with wandering limbs and eager hands" is probably her act of body language that she doesn't want to be with him anymore yet he can't let her go.