Why is bauhinia ticklish?

Some people think that the trunk of Lagerstroemia indica contains a special substance, which is similar to human sensory nerves. It can sense external stimuli and respond, and when the response is quickly transmitted to the treetops, it will cause the branches to shake.

Some people think it is because of the bioelectricity of plants themselves. Others think that crape myrtle is smooth, its branches are soft, and the whole body will shake at the slightest contact. Although there is no final conclusion at present, I believe that one day scientists will reveal the real reason why Wei Zi is "ticklish".