Here's an absolutely amazing story about Abigail and Brittany Hensel, conjoined twins:
Despite sharing a body, the twins have different tastes in food and clothes. Some of their clothes are altered so that they have two separate necklines in order to emphasize their individuality. According to a TLC documentary (discussed later) in 2006, they negotiate what they will wear each day. They will usually have separate meals, but sometimes will share a single meal for the sake of convenience (e.g. each takes a bite of a hamburger). [...]
They appeared in a follow-up documentary on The Learning Channel on December 17, 2006 filmed around the time of their 16th birthday, in which they discuss dealing with puberty and getting their driver's licenses.
They successfully passed their driver license exam, both the written and driving tests. They had to take the tests twice, once for each twin. Both control the steering wheel, Abby controls the pedals and gear stick, and Brittany controls the turn signal.