I can't curl my tongue length-wise. No gene for that. The best I can do is make it look like a spoon. I've met people who can curl it right around so that it almost looks like a drinking straw. I am left-eye dominant.
Most folks are right-eye dominant.
Supposedly, it's a good trait if you play golf, but you'd never know it by looking at my scores. What is true is that I'm very concerned about what I eat. I probably eat less than 5 pounds of red meat per year. I eat a fair amount of fish and poultry though. Everything I've read makes me believe that humans have evolved to eat some flesh, just not a lot of it.