unless there is a crack or flaw in the surface of the egg, or you have a ring or other dense object embedded in your palm

Q) then you can't break it.. I think the structural rigidity of the elliptical egg is strong enough to withstand pressure in equal amounts around the entire surface area that is higher than the crushing power of the human forearm :Q
heres an experiment to piss the guys off.. sit a chair with its back against the wall. stand in front of it. bend at the hips over the chair, and rest the top of your head agains the wall. reach down and try to pick up the chair. supposedly men aren't able to do it, but women can very easily.. has to do with the hip shape being different in women or their center of gravity or something