I'm just posting my experience.
I had the reputation of a fussy child. Actually looking back I wasn't. I was the best of the three of us at trying things, and ate a wider variety than either of the others, who weren't given that reputation.
But I had two hates: Brown bread and mashed potato.
Problem was my dp thought that white bread had no business existing and all hot meals (except fish and chips) were not complete without mashed potato. We even had fish fingers with mash.
My df in particular believed you had to eat these to stay healthy.
So every meal time I sat down with these food stuff which I loathed. Dm found fairly early on that saying "eat it or go hungry" didn't work-my appetite goes very quickly if I don't eat, so I can go a very long time without eating anything. So I wasn't given that option.
The issues I have are:
Mashed potato is the texture. Made worse by the occasional lump.
Bread is a funny one. I don't like it soggy with water. I can quite happily dip it in egg or soup, but water sends me retching. In fact just thinking about it then has made me retch. Problem is bread in your mouth goes soggy, then I retch, and even am sick on many occasions.
I can now cope with white bread, but the look or smell of brown bread sends me retching. When I'm ill (or pregnant) the first thing I go off is all bread.
I remember one particular time when I had a pickled onion on the side of my plate. Turned it over and there was one crumb of bread underneath soaked in the vinegar. Was suddenly and dramatically sick over the table. Dm was convinced I must have a bug, and no amount of explaining convinced her. One crumb!
I am perfectly aware this is totally Psychological, and I'd love not to have the issue. I find it very embarrassing. It also leaves me hungry on many occasions when I've turned up and all there is on offer is shepherds pie or brown bread.
Interestingly although I have been very careful not to say anything in front of the children. They all loved mashed potato-I don't often make it, so it's a huge treat. I can make it without retching now, which at one point I couldn't. Dh has to wash the pan out though, can't cope with that. But my oldest (who's 13yo) has started saying she doesn't like bread in packed lunches because "the bread is soggy". Which was exactly my issues.