yeah, that'd be pretty tricky, since- unless I read this wrong- according to this sentence:
[Fused at the nose, breasts, and belly, with that joined belly leading into a single pair of legs...]
they only have one leg each now. plus with how radically different their heights are and they don't seem to be joined at the Pelvis, what we're looking at is pretty much "Co-Op Walking, Dante Must Die Mode."
but I'm mainly talking about how their minds work now. the story said thanks to their new hive mind, they were effectively lost in their own little world. it's never made clear if they could respond to any outward stimuli, like conversation or, as I brought up, hunger. who's to say they won't neglect eating just to ogle each other some more...?