Feelings are critical, I think.
A situation or an experience which creates a pleasant feeling, or which feels emotionally satisfying in some way can be difficult to let go of. One tries to repeat the experience in order to repeat, or maintain, that feeling.I suspect that this mechanism and the drive for emotional fulfilment is at the root of the process of identity formation.
I have a friend ( two friends actually, but here i refer to one in particular)) who tends to express all of her life and emotional crises through dramatic physical disease, malfunction or distress. Her marriage broke up when on one occasion she felt her husband did not take her injury as seriously( or show as much concern) as she had expected.
When she was a child she was taken ill with a life threatening condition and was hospitalised. She recognises that she enjoyed all of the love and attention ( and the drama) that being so ill solicited from her parents and from the nursing staff. Even though as an adult she recognises this - Illness, injury or disease has become a primary way through which she works through her life crises. However, she is very much into self transformation and she puts a lot of emotional energy and commitment into recovering from any ailments she does suffer. She rarely, if ever, sees a doctor.
That is not to discount her ailments when they occur. They are real.
Grayson Perry, in his memoir, tells of his absent father and a brutal step-father. As a child he had a teddy bear who became known as 'Alan Measles'. Alan Measles became a sort of transitional object that contained and represented all of his more turbulent, and delicate, feelings ( I think he'd been given the teddy when he was ill with measles).
It was also around this time( 4 years old) that he started to secretly wear his mother's and sister's clothing. In his mind a little girl would be the recipient of more care and love from others than he felt he, as a boy, was receiving. Boys were supposed not to cry and to be tough. Dressing up as a girl was a way to recreate the feeling of being loved and cared for. As an adult his favourite cross dressing character was initially a 4 year old girl ( can't recall her name). Dressing this way in public also brought him lots of attention.