I feel like I am the antithesis of this question.

When I was a kid, I had a difficult time learning how to whistle, and so I decided I would learn all of the "stupid human tricks" that I could, and now as an adult, I don't know of any common skill that I do not have at least an advanced beginner or intermediate level.

Maybe you can help me by identifying what you believe is a common skill and then I'll see if I know it or not and respond.