Is it possible to NOT know how to climb?

[Trini]

I can't climb trees, but I can climb fences. Or if it's short enough, I'll just hop right over. I've done it on multiple occasions, and it's actually kind of fun.

Until you trip and bust your ass. 

That's exactly why I don't jump over anything anymore.

[YPrrrr]

I suck at hopping fences. I can climb trees however, or at least I could when I was young

[Selkie]

We had the greatest Apple tree ever to climb in my backyard. Oh the memories...

But it is dying now, and one half of it had to be cut down because it was totally dead.