There was a TV show about twins, specifically conjoined twins, where 2 girls were in one body, but with 2 heads. The family decided to raise them/her and they were probably around 10 y.o. They went to school, played, etc. Very strange sight at first glance, but the family treated them as 2 people with 2 names, etc. They seemed to have normal intelligence, etc. Very interesting. That was somewhere in the USA and probably they received great medical care to have reached that point.