""(yes,i realize this is a rather bizarre choice, but you get my point.....)my son (who is great) and prince william (same age and really useless) who is a human...""

Do you really think your son would have the aptitude or the talent to replace that useless human....(what?) over the mountains of Snowdonia in a Sea King rescue helicopter in winter with the cloud base at 400 feet, preserving the lives of good strapping "salt of the Earth" working types who haven't the sense to stay away in bad weather?

I don't think so!

Don T.