While there are 'ten thousand things' in the universe to be aware of, we each come packaged in one bodily unit (for the most part and kudos to those conjoined twins who keep us all aware of the possibilities in life and the idea of sticking with someone 'through thick and thin.' As I recall the pair of brothers who were called the Siamese Twins led full lives, each having a family even.
Sadly back in their time they didn't realize a relatively simple surgery would have allowed them to be disconnected.When one died, the other waited it out until he perished.