by Jacara » March 31st, 2006, 9:26 am
Basically, since hypnosis can affect the really deep parts of the mind, and the mind controls hormones, and hormones can change hair colour (my hair darkened at puberty, and many women's hair colour changes after pregnancy)... it's theoretically possible, although very difficult/rare. Maybe if a subject went very deep, and a hypnotist tried various methods to convince the body to do that... but again, very hard to do.
Anything the body that has already happened is easy to re-do, like breast growth in women or penis growth in men. Like someone here said before, the subconscious understands "do as you did before."
I would doubt that anyone has ever grown a tail (for example) through the power of their mind.