People Collide

This turned out to be nothing more than a simplistic body swap story that feels like it set out to explore how perspective and life changes if you inhabit the opposite sex or your partner, but never really got beneath the surface.  Given there were a few interesting dynamics at play - like the sexual explorations and embedding yourself in the other's life - yet it comes with lots of filler and a confounding final Part that seems to have no significance or conclusion.  The prose was fine and the pace was good, it just spent too much time in the less interesting parts of the premise and omitted all of the how and the why that might've ended up being the best part.