Is it possible to overcome dislike for certain foods?

When I was little I know I liked tuna fish sandwiches, but I would literally puke if I tried to eat fish now. I also have this problem with most cheeses with the exception of things like pizza, cheesecake, or cheeze-it crackers or cheese puffs. Mayo is another food I'm not fond of, but not to the same extent as... show more When I was little I know I liked tuna fish sandwiches, but I would literally puke if I tried to eat fish now. I also have this problem with most cheeses with the exception of things like pizza, cheesecake, or cheeze-it crackers or cheese puffs. Mayo is another food I'm not fond of, but not to the same extent as fish and cheese. Is this a mental thing or what? Is there anyway I can get over this? Is this something I can control?
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