In reply to higherclimbingwales: It's the height. For example I can stand at the bottom of Malham Cove and look up, and the knees start knocking followed by feeling dizzy. The same thing happens at the top as well, i can't go near the edge.
Don't get me wrong, i'd give my left testicle to be able to climb, but whenever i've tried i get about 6' up and just freeze.
I'm fine up on the hill when there's solid ground under me, in fact the higher the better. Maybe it's the exposure that gets me, i don't know. What i do know is that is depresses me when i read about the routes that you lot do.
Jealous? Yes, very much so.