I remember there was a science fiction book on this subject, I don't remember the name. This guy is hired as a body double for a dictator and taught to mimic the dictators actions, posture, speech, everything. When the dictator is shot through the head, his body remains intact and the body double's body is burnt beyond recognition. Scientists under orders do a brain transplant of the body double's brain into the body of the dictator. When he wakes up the first thing he notices is differences in perception, touch, smell, taste are all different to what he was used to. Later on he started to experience strange cravings, which through the course of the book turned him into an even more bloodthirsty dictator than the other one was.
Anyway, when it comes to science fiction, anything is possible.
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~