Why is fruit sweet, not salty or spicy?

The fruit of the plant is not necessarily spicy, which can effectively protect the fruit from being eaten by other predators. Spicy is a sensation of pain, which can be caused by alkaloids in plants, but we don't eat them. It is not excluded that some "fruits" are salty, because some plants will actively absorb inorganic salt components, and when they reach a certain level, they will have a salty taste when they accumulate in the fruit.

That said, most fruits will be sweet, which is an important energy source for seed development. In fact, many dishes also have a sweet taste, because as long as they contain sugar, they will be sweet. However, it will be salty if it contains sodium ions, not in fruits.

As far as I know, edible spicy agents are all extracted from chili peppers, and only chili peppers should be spicy. <>

A fruit is defined as a juicy and sweet plant fruit, with some exceptions (such as a juicy banana or a very sour lemon), but it is not a fruit if it is not sweet by and large. If you want to ask "why some fruits are sweet, are there any fruits that are not sweet", then the answer is different, there are many fruits that are not sweet, for example, peppers are spicy, why some are sweet and some are spicy, this is related to the way the seeds are spreading, some plants happen to lick the fruit, then the animal will eat it, and then the seeds will be taken out, then such plants will spread more widely, and natural selection will stay, and then it will become sweeter and sweeter. Some happen to be spicy, so that no animal will eat it, and its seeds will naturally spill after the fruit is dried, so that it can also survive, so natural selection also stays, and then it gets hotter and hotter.

To put it simply, in fact, this question is equivalent to asking what is the "definition of taste" and what is sweetness? Why is something like fruit sweet? To put it simply, the sense of taste is just a tool for discerning what should be imported and what should be spit out.

Sugar is important for energy**, and the more the merrier. Therefore, everything that has the taste of sugar should be eaten more, and this taste is named "sweet"! Salt (containing various minerals) is also necessary for the human body, but the amount is limited, and it must be eaten but not too much.

Anything that has a mineral flavor should be eaten in moderation, this taste is named "salty" Some substances are toxic to the human body, and they will have stomach pain and even die if they eat it, this kind of thing cannot be eaten, and the similar taste of toxins is named "bitter", which means that it cannot be eaten. Some things, which have been rotten, will have stomach aches or even die if they are eaten, or they should be avoided, similar to bitterness, and this is how the smell is defined. Therefore, it is not that fruits are sweet, but also sour and bitter.

But because people define the taste of sugar as sweet, then the things that provide sugar are of course called sweet foods, and fruits contain a lot of sugar, so what can you do if they are not sweet? After all, vocabulary is a description and classification of the objective world, not an invention made out of thin air. If the composition of the fruit remains the same, but we do not call it sweet, but call it salty, it is just a reversal of the meaning of the words sweet and salty, and its direction and connotation remain the same.

This question, in my opinion, is equivalent to "why does the sun come out of the east and not from the west", yes, no, no, the sun does not come out of the east, but we call the direction in which the sun comes out, "east", and that's it. The reason why fruits are sweet but not salty is because we define the taste of fruits (in fact, the taste of sugar) as sweet, and that's it. <>

This is mainly the classification of people, just like animals that have living activities, and classify them according to what exists.

Therefore, we will call sweet fruits as fruits, and if they are not sweet or poisonous, they will not be classified as fruits, and there are many fruits that cannot be called fruits because they cannot be eaten or have a bad bitter taste.

And why is the fruit sweet, because this is a way of reproduction of plants, because the sweetness can attract animals to eat, and after eating, the seeds will spread to another place through animal excrement.