Humans are born liking sweet, umami, and low salt tastes, and disliking bitter and sour tastes.

“You are born liking sugar and disliking bitter. You have no choice. These are hard wire systems, but of course you can learn to dislike sugar and to like bitters, but in the while, let's take humans out of the question, these are a hundred percent predetermined. You are born with that specific valance value for each taste of sweet, umami and low salt are attractive taste qualities. They evoke appetitive responses, I want to consume them. And bitter and sour are innately, predetermined to be aversive.”