1) I know the tongue is a muscle, but can the tongue essentially also be considered as a mammalian "tentacle"?

And

2) Has any genomic research been done regarding the variation seen in human tongue "dexterity" within the public?

For context, I'm about to finish my third year of a 4 year integrated-masters degree in genetics, and shit like what's shown in this .webm fascinates me... How the hell do some people have this level of control over their tongue compared to others within the general public who mostly don't?

INB4 sexual comments and booba posters.