Did they have to take one or two test on subjects?
http://tv.yahoo.com/news/conjoined-twins--abby---brittany--get-their-own-reality-show--video-.html..Conjoined twins 'Abby & Brittany' get their own reality show [Video]
TLC has given us reality TV shows about strange addictions, extreme couponers, and pint-size pageant queens. But it may top itself later this month with "Abby & Brittany," a look at the lives of conjoined twins Abigail and Brittany Hensel, who have miraculously survived to the age of 22 despite sharing one body fused together at the torso.
When Abby and Brittany were born back in 1990, the doctors told their parents they most likely wouldn't survive the night. (One in 40,000 twin births are conjoined, and just one percent of those make it to the age of one.) But they defied the medical odds by not only surviving, but thriving. At six years old, the twins were featured on Oprah and appeared on the cover of Life magazine, but since then, parents Patty and Mike have raised the twins out of the media spotlight in rural Minnesota, giving them a chance at a normal childhood.
And the most shocking thing about "Abby & Brittany" is how normal the girls are. They do share a body (with Abby controlling the right side and Brittany the left), but the girls have two very distinct personalities; as Brittany says, "Believe me, we are totally different people." They've worked together to earn a drivers' license and graduate from college, and now are getting ready to enter the job market and see the world with their friends... with reality TV cameras following their every move.