Usually when you buy a small pineapple, the store will tell you to eat it directly without soaking in salt water. The reason why the store kindly reminds you is because he soaked it in saccharin. If you soak it in salt water again, it will lose its sweetness. Of course, we don't mean that all small pineapples are soaked in sugar water, only some unscrupulous traders will do so.
If you also like to eat small pineapples, you must pay attention when buying them. Open the bag first and smell it for deterioration, because some of them are directly packed in the bag and are easy to deteriorate.
Then you can ask for a taste. If it tastes normal and sweet, you can buy it. Although Thai pineapple is very sweet, it is still slightly sour. If you buy a pure sweet Thai pineapple, it is probably soaked in saccharin!