I know someone like that. Even pictures and toys aren't bearable, but I think the way nature works is that whatever can survive, does exist, so good for them. Some birds prey on snakes but I avoid that kind of picture because it isn't polite to watch someone eat. I also hang out in coffee shops and don't want to offend random people behind me.
I read quite a few books on past life experiences and where they would hypnotize people and ask them to keep going back and they would jump into previous lives and tell how they had died and some of them supposedly had birthmarks in the places that caused him to die in previous lives. I don't know if I really believe any of it but it was interesting reading at the time. But something happened around age 40 and anytime I would look at a snake, my left foot would instantly be charged as if it was exposed to 120 volts, so who knows maybe at age 40 in a previous life I was bit by a poisonous snake and died that way.