Genetic difference. Just like people who can raise one eyebrow. Not all of us have the same muscle control. Likely a leftover from days where we could point our ears towards a sound like small-eared dogs can.
Tongue rolling is the ability to roll the lateral edges of the tongue upwards into a tube. The tongue’s intrinsic muscles allow some people to form their tongues into specific shapes. Rolling the tongue into a tube shape is often described as a dominant trait with simple Mendelian inheritance, and it is commonly referenced in introductory and genetic biology courses, although there is some disagreement.[1]
Genetic difference. Just like people who can raise one eyebrow. Not all of us have the same muscle control. Likely a leftover from days where we could point our ears towards a sound like small-eared dogs can.
Wait until y’all hear about ear rumbling and eye wiggling…
Anybody can learn to use these muscles. It doesn’t just come naturally.
Some people say maybe. Some say maybe not.
https://www.livescience.com/33809-wiggle-ears.html
https://www.nytimes.com/2017/01/16/science/wiggle-ears.html
“Some people can reportedly improve their ear wiggling by concentration and practice, but they have to have the ability to begin with.”
The things that it requires most is patience.
https://en.wikipedia.org/wiki/Tongue_rolling
https://upload.wikimedia.org/wikipedia/commons/a/a0/Tongue_rolled.jpg