Firstly, if we became HalfHuman & HalfCat, our CatHalf may keep on rubbing against people's legs!
Secondly, if we became HalfHuman & HalfCat, for no apparent reason, our CatHalf may start doing MeowMeow!
Thirdly, if we became HalfHuman & HalfCat, Birds may no longer come near us!
Lastly, if we became HalfHuman & HalfCat, both our halfs may have completely different styles of eating!