Although swallowing watermelon seeds isn't harmful, it would be even better if we could conveniently remove them when cutting the watermelon. Below, I will teach you the most convenient and quickest method. In just four steps, you can easily remove the watermelon seeds while you're cutting it. Done in just four steps, it's safe and hygienic—a secret I wouldn't just tell anyone.
Step one: Cut off both ends of the watermelon and cut it along the line at the three-quarters mark, as shown in the picture. That's the white line in the image.
Step two: Make a small cut along one of these lines, slicing just a small triangular piece of the watermelon. You will see this is a seed line, where the watermelon seeds are hidden.
Step three: If you do this, the small piece you've cut off will contain most of the seeds from the seed line. Now you can use a soup spoon to remove the seeds from this piece.
Step four: Repeat the above steps, cutting several more small pieces along the seed line until all the seeds are removed. For any remaining seeds hidden in the center of the watermelon that are difficult to remove, you can simply scoop out that round piece of flesh and use it for other purposes.