it's nothing to do with genetics after all?
Despite what most of us were probably taught at school! It was debunked, as you can be taught to roll your tongue.
Can you touch your toes?
I can roll my tongue, and despite being very fat overweight, I have no difficulties in touching my toes. My slim DH can do neither.
AIBU to ask what you can or can't do that you take for granted? Or that's an interesting body fact?