Some people were born with the normal body shape. But some are not. Though the number of unnatural body shaped people is less, they are available in this earth. It is happened due to some genetic disorder or something else. In the above mentioned link you will see the video of a twin who is really inseparable. The body is attached in such a way that you can never make them separate. Most importantly, they do not to be separated also. If you watch the video you will experience how happy they are along with two different souls in a single body.