Warning - this post contains a picture of buttons.
Ever since my son was tiny, long before he could talk, he has disliked buttons. I have racked my brain trying to think of a bad button experience when he was small, but I can't. Nothing. I have no idea where it came from. Since he has been able to speak, we have known more about his aversion to buttons, "I don't like buttons" being regularly voiced. Initially myself and my husband were not allowed to wear them. He refused to cuddle or be near people who were wearing buttons. Once we were aware of the problem, we stopped wearing buttons, but there were some occasions when we couldn't help it, and the boy had to learn to deal with it.
As a baby and toddler, we made sure any clothes we bought him didn't have buttons on and endeavoured not to wear buttons ourselves. When he started pre-school, his uniform was a polo shirt, which had buttons on it. We prepared him and he eventually got used to the idea. - See more at: http://www.offcumden.com/2013/09/i-dont-like-buttons-my-sons-strange.html#more