1, let the tongue roll up to the middle of both sides.

2. Shrink the rolled tongue back with the muscles of the base of the tongue.

3. Put down the sides of the tongue that was originally rolled up, and fix the tongue with teeth and lips at the same time, so that a lotus-shaped tongue will stick out.

The ability to roll the tongue is not entirely hereditary;

Tongue rolling is a conditioned reflex at birth. This conditioned reflex is always used when sucking breast milk or bottle, but some people degenerate this reflex when they grow up.

There are many muscles in the human body, some of which are strength muscles, such as those in our arms. If you don't use the strength of your hands, it won't change its shape at will. And some muscles are memory muscles, which can be deformed by movement. For example, the muscles on our tongue belong to memory muscles and can be stretched and deformed at will, so they can be changed into various shapes.