Hi, I'm trying to understand what the nature of gravity is. I know it is a force, and I know that heavy objects tend to attract other object, but why? It seems that this is because spacetime is bent. I don't really know what that means because my knowledge about spacetime is limited. Everywhere I see, people explain this with the analogy of having a bowling ball sitting on a stretched sheet (representing spacetime), bending it, so a golf ball would tend to fall towards the bowling ball. But that explanation doesn't satisfy me, because the bowling ball makes a lower point on the sheet, and the golf ball is only attracted towards the bowling ball because of gravity. So that explanation basically only says that gravity occurs because of gravity. Could anyone give me a better explanation as to why heavy objects bend spacetime and why would other objects get attracted to the bigger one in that case? Thank you.